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  • #1236686
    Bill Fornshell
    BPL Member

    @bfornshell

    Locale: Southern Texas

    Super Ultra Light / Super Ultra Cheap

    I have been quietly working on this idea for a few months. You can go back and check one of my threads about the new external frame I was working on where I mentioned a material I had discovered that worked well for Pack Bags. This material was used for bags to hold something and the bag was made to be thrown away after being used. I started thinking about other materials that might be recycled into SUL gear.

    SUL as definded here was very easy for me to achieve using the new materials such as Cuben Fiber and a few others. There is however, a cost factor and I started looking for other material that were free or cheap.

    This really came to light a few days ago when someone here had a light weight Down Quilt made and the cost was posted was $450. I have been making most all my gear now for several years and I guess I lost track of what things are selling for.

    Is it really necessary to spend that kind of money to have SUL gear?

    Can we find enough really cheap or almost free (as in recycled) material to build a decent set of Super Ultra Light (SUL) gear?

    I think so but most of this will require sewing your own gear. Sewing is not as hard as you might think. Start small and work toward the more complicated things. Things in you live may get so bad over the next few years that you might be very glad you know how to sew.

    The complete gear list has to be under the 5 pound weight limit as defined by BackpackingLight.com as SUL and survive a continuous hike of at least a 165 miles on a trail system such as the Appalachian Trail. The material used for this gear needs to be readily available so as many folks that want to us it can get it.

    I think the total – weight / cost – will be a good surprise to many.

    1 – Backpack:

    I have been playing with one type of material that turns out to be good for packs. I have even used this material for shoulder straps and hip belts.

    You can see the first pack bag I made out of this material in this picture.


    The material weighs 3.4 ounces a square yard but the total weigh for a decent size pack should be well under one pound. The material is very strong and easy to sew.

    The real $$ cost of this pack (the material is from something meant to be thrown away) might be $5.00. I will post more about this material as this project moves forward.

    2 – Bivy:

    Bottom Material:

    Gossamer Gear (GG) sells a "Polycryo Ground Cloth.

    I bought one of their (2) packs several years ago. At the time I thought this stuff might be good for other things but since I was using a lot of Cuben Fiber I never made anything with it. When I first got mine I weighed it to see what the square yard weight was. It is 0.568 ounces per sq yard.

    The ground cloths cost (2) for $8.00. Now that I am looking for cheaper alternative materials I am re-looking at what I might be able to make with this material.

    I have made several Bivys using Cuben Fiber as the bottom and Pertex Quantum as the top. I will try a Bivy using one of these Polycryo Ground Cloths for the Bivy Bottom.

    From GG about the Polycryo Ground Cloths:

    "The Polycryo ground sheet is constructed from industrial grade cross-linked polyolefin. This material is extremely tough for it's weight, with amazing puncture resistance. It has a tensile strength of 15,400 p.s.i. (1,083 kg./sq. cm.) per ASTM D-883. It is waterproof, but very slightly breathable (1.09 gms of water vapor/100 sq.in./24 hours). At 0.55 oz./sq.yd. (16 g.), it's HALF THE WEIGHT of our Spinnsheet™ ground cloths. You will have to replace this more often than tougher alternatives, but it's very economical. These single ground cloths are shipped as a 2-pack so you have an extra. Our medium size is 40" (102 cm.) wide.'

    Ground Cloth Link

    Top Material:

    Frogg Toggs make a poncho out of a very nice material that is said to be 100% waterproof and breathable. It would seem that this material would make a good top material for the Bivy. I need to find out the size of this item but just in looking at it I am sure it is big enough.

    Frogg Toggs Poncho

    I believe that Frogg Toggs is made from something like 3M Propore. I have a sample of the 3M Propore and it weighs 2.37 ounces a squard yard.

    A Bivy made from the GG ground Cloth and the material from a Frogg Toggs Poncho should weigh about 6 ounces.

    Cost: I have found the Frogg Toggs Poncho listed on two different web sites. It is selling for $11.50 at one place and seems to be on close out at $8.95 on another web site. I will call both on Monday and confirm prices. Using what seems to be the MSRP of $11.50 for the Poncho and $4.00 for one GG Ground Cloth, the total Bivy cost would be a bit under $16 plus shipping, tax etc.

    http://www.sierratradingpost.com/Product.aspx?baseno=1765T&plp=Frogg_Toggs_Dri_Ducks_Action_Poncho_-_(Waterproof_For_Men_and_Women)&utm_source=Yahoo&utm_medium=PaidSearch&utm_term=Frogg_Toggs_Dri_Ducks_Action_Poncho_-_(Waterproof_For_Men_and_Women)&utm_campaign=PMYAHOOINC9&codesProcessed=true

    3 – Shelter – Tarp

    My first thought is to make a tarp out of 3 GG Ground Cloths sewn, glued or taped together.

    The Tarp would be about 10" by 12' and the tarp material weight would a little less than 2 ounces. Add in some weight for the tie out line ( 1.42 oz) 6 stakes made out of – you pick it ( 1.23 oz) and a few secret things and you have a big tarp that weighs under 5 ounces.

    #1504841
    peter kvamme
    Member

    @karacolor

    Locale: midwest

    Please do restart this topic again, you peaked my curiosity when you mentioned a strong, almost free material at 3.4 oz/yard in the another thread. Even if you do not want to give us an in depth post, any chance you would share what kind of materials you are considering?
    Always fun to watch your projects evolve.
    Peter

    #1504855
    Rog Tallbloke
    BPL Member

    @tallbloke

    Locale: DON'T LOOK DOWN!!

    I second Peter, please do repost your original threadstarter Bill. I read it last night and was about to reply when my inet connection packed up – it was late anyway.

    You may have seen the discussion regarding the possibilities of a SUL air filled quilt on Steven's cuben/down quilt thread, I have started a new one for it. I for one am in total agreement with your observations about the availability of light materials for cheap or free.

    Does this mean you might have some surplus 0.33 Cuben I can buy off you. ;-)

    #1504883
    t.darrah
    BPL Member

    @thomdarrah

    Locale: Southern Oregon

    I will follow this thread closely also.

    I enjoy working with construction grade tyvek for this very reason. It is relatively light,not expensive, water resistant, strong and bondable. It could be used to make numerous items typically found in most gear lists. A bivy, shelter, rain protection (cape, chaps) and even a pack bag. I think a 9' x 150' roll costs around $100.00, and it can often be found in usable size scraps for free. The tyvek material is not super UL but does provide a good performance/weight/cost ratio for MYOG projects.

    #1505064
    mark henley
    Member

    @flash582

    Do we include MYOG?

    #1505400
    Bill Fornshell
    BPL Member

    @bfornshell

    Locale: Southern Texas

    This is all about MYOG but a long spoon from some ice cream place works as it should be free.

    =====

    Super Ultra Light / Super Ultra Cheap PT 1 – Making the Bivy:

    The first picture shows the GG Ground Cloth laying on my pattern. The size of the Ground Cloth is almost the same size as my pattern. I am leaving a 1" seam allowance. This will allow me to turn it under to reinforce the seam.

    1. GG Ground Cloth on the Pattern.

    2. The GG Ground Cloth is cut and weighs 41 grams or 1.44 ounces. Cost for one of 2 GG Ground Cloths = $4.00 plus shipping.

    3. The Propore on the Pattern ready to mark.

    4. The Propore cut and ready to sew. The weight of the Propore Bivy Top is 4.7 ounces. Cost as a new Frogg Toggs Poncho = $11.50 plus shipping. I have 2 Frogg Toggs Ponchos on order and when I get them I will make another Bivy out of one of them.

    5. Ready to start sewing.

    Estimated cost for the materials only for the completed Bivy = $17.00 (+/-) a bit.
    Estimated weight of the completed Bivy = 6 ounces (+/-) a bit

    Sewing to follow.

    NOTICE!!!!!!!!!

    I had a lot of problems finding a way to sew the Polycryo material.

    I would suggest anyone that wants to sew with this material that you do many tests and stress the seams a bit till you are happy with the sewing method.

    6.

    7.

    8.

    The Bivy weighs 6.1 ounces. I will make a small hood out of Propore and attach the hood sometime over the next day or so.

    A "Waterproof / Breathable Bivy" like this can be made for about $17.00.

    If you have an idea you would like to share leave a me comment.

    #1505531
    Sam Haraldson
    BPL Member

    @sharalds

    Locale: Gallatin Range

    > The Bivy weighs 6.1 ounces. I will make a small hood out of Propore and attach the hood sometime over the next day or so.

    Doing the math from your provided specs provides: GG Ground Cloth (1.44 oz) + Propore Bivy Top (4.7 oz.) = 6.14 oz. What do you expect the hood to weigh? If it comes in around an ounce you'll have a very competetive bivy here.

    #1505541
    mark cole
    BPL Member

    @marklivia

    God I love the way you think Bill. Keep it up.

    #1505543
    Jim Colten
    BPL Member

    @jcolten

    Locale: MN

    THIS is gonna be a great thread! Thank You Bill.

    re: 3.4oz/sqyd pack material
    Sounds intriguing … is it a woven material by any chance? (working my brain trying to guess what it is)

    re: polycryo
    It has been said here on BPL forums that polycryo is the material used for heat shrink window insulation film. I have both and the tactile feel is the same, weight is the same within precision of my scale and I have noticed that the GG polycryo has shrunk a bit after being in a tarp's stuff sack on the outside of a pack on a hot sunny day. So, maybe it is the same material. If so, it is available in 62"x210" sheets for $9.89 and 84"x120" sheets for $8.39 (add shipping) at Amazon. I have not checked prices at local mass retail outlets.

    The 84" width would make a single piece tarp for many folks who are also using a bivy.

    Water bottles:
    These might be pushing the boundaries required to reach SUL but the reused 1 liter soda/water bottles I use weigh in at 1.6oz (compared to 0.8oz for a 1 liter platypus).

    #1505555
    Nate Meinzer
    Member

    @rezniem

    Locale: San Francisco

    Bill,

    Great looking bivy there. Are you suggesting that the Polycro could be used to make a tarp? That would be quite a precarious tarp to weather a real storm under, no? Material seems very prone to puncture and tearing….though, I've only babied it so don't know for sure.

    #1505558
    . .
    BPL Member

    @biointegra

    Locale: Puget Sound

    (great thread)

    I've been keeping my eye out for sources along these lines for a while now.

    One idea for a pack is to use one of these poly recyclable grocery bags that most stores are selling now as a base. Even REI has one for $1 —->

    (rei shopping bag example link)

    reibag

    Tyvek leftovers are often available for free at construction sites (of course there are far fewer of these now), or on craigslist.

    I also really like the idea of using wood/cane/bamboo for poles, frame components, utensils, etc. and intend on pursuing this more once I am done building our house.

    It would be interesting to see some hypothetical SUL/SUC gear lists with dollar totals and sources.

    #1505599
    Matt Mahaney
    BPL Member

    @matt_mahaney

    Locale: In the District

    Great thread. I've been wondering about how the GG ground cloths sew. What types of problems did you run into, Bill?

    #1505705
    Steven Bergeron
    Spectator

    @theturk-2

    Locale: SF Bay Area

    Bill,

    Thanks for the posting. As always, very generous of you to share so much about your work.

    #1506251
    Bill Fornshell
    BPL Member

    @bfornshell

    Locale: Southern Texas

    Instant Bivy:

    I received the two Frogg Toggs Ponchos this evening from Sierra Trading Post. Three and a half days after I ordered them. Quick shipping.

    The Poncho is 52" wide by 87" long. The Poncho has three snaps on each side to close the Poncho when you are wearing it. The Poncho weighs 238 grams / 8.4 ounces.

    The first thing I wanted to try was snapping both Ponchos together to make an "Instant Bivy".

    I got in between the two snapped together Ponchos. My room was 76 degrees "F" and I think I started to get warm in the "Instant Bivy".

    The cost for a Bivy like this would be $24.00 for the two Ponchos.
    The weight for two Ponchos used as a Bivy would be about 16.8 ounces. This would figure out to $1.45 per ounce.

    I think a Bivy made from two Frogg Toggs Ponchos would make a good multi use piece of gear. A Poncho when needed and your Bivy at night.

    The Frogg Toggs DriDucks material maybe as good or better than eVent and it sure cost a lot less.

    1. Both Frogg Toggs Ponchos snapped together.

    2. Frogg Toggs Poncho open halfway.

    #1506295
    Barrie Grieve
    BPL Member

    @barrie_grieve

    Locale: Fife, Scotland

    what about two pieces of equal size 2.5m x 1.5m , one breathable the other not, sewn together down one long side with various tie tabs sewn on.

    #1506301
    Rog Tallbloke
    BPL Member

    @tallbloke

    Locale: DON'T LOOK DOWN!!

    Hi Bill, nice simple idea. I wondered about making a bivy out of a clothing grade tyvek XXL overall. Just cut up the leg inseams and glue together. Maybe do the same with the arms for more lofting space for the quilt. I guess it would work for a shorty, but I'm XXL anyway length ways. Would probably be a lot lighter than two ponchos.

    #1506306
    Rod Lawlor
    BPL Member

    @rod_lawlor

    Locale: Australia

    The cost for a Bivy like this would be $24.00 for the two Ponchos.
    The weight for two Ponchos used as a Bivy would be about 16.8 ounces. This would figure out to $1.45 per ounce.

    I think a Bivy made from two Frogg Toggs Ponchos would make a good multi use piece of gear. A Poncho when needed and your Bivy at night.

    Bill, what about using one poncho, plus a gusset to make up the required circumference, instead of the second poncho. You'd probably only need another 10-20" of material, plus a means to attach it to the poncho. Maybe you could attach it directly to the underside of your closed cell mat, and do away with a gusset all together

    #1506360
    Bill Fornshell
    BPL Member

    @bfornshell

    Locale: Southern Texas

    Thanks to all of you that have taken some time to comment.

    The great part of all of this is that there is no one right answer.

    Their are many different ways to get to an answer and many answers will start with just trying what you have around you. Not everything will work but that is OK also. Each idea should lead to the next idea etc, etc.

    The Frogg Toggs – DriDuck material is really nice. It is to bad we can't buy it by the yard. But since we can't buy eVent we can buy the Poncho and use the material from it. As best I can figure the DriDucks material from a Frogg Toggs Poncho cost $2.86 a sq yard.

    Going back to my first idea for this material, when used with the Gossamer Gear Polycryo Ground Cloth it will make a Bivy that would weigh a bit less then 10 ounces and a cost of $13 plus shipping.

    I have to order a couple more of the GG Ground Cloths.

    #1506371
    Walter Carrington
    BPL Member

    @snowleopard

    Locale: Mass.

    jcolten: "re: polycryo
    It has been said here on BPL forums that polycryo is the material used for heat shrink window insulation film. I have both and the tactile feel is the same, weight is the same within precision of my scale and I have noticed that the GG polycryo has shrunk a bit after being in a tarp's stuff sack on the outside of a pack on a hot sunny day.

    The 84" width would make a single piece tarp for many folks who are also using a bivy."

    I haven't seen the GG polycryo ground sheet, but I have some of the window insulation shrink film. It's surprisingly tough, but I'm a little skeptical of using it for a tarp.
    Pulling on a 3" strip of it tears with a snap straight across; it doesn't take a lot of force. On the plus side, the double sided tape holds well with zero curing time. Pulling on a 3" strip taped to itself, the tape holds and the film tears. Perhaps if it is carefully engineered so forces are spread across a much larger area it would work. The same film is used for inside or outside "storm windows", just the tape is different, so it must hold up to a certain amount of wind.

    Perhaps doing the old trick of using the seams to add strength along high tension lines might work — by folding it several times at seams and a couple lines of tape.
    Two brands at amazon:
    http://www.amazon.com/3M-2144W-Indoor-Patio-Insulator/dp/B0000CBJ80/ref=pd_bxgy_hi_text_b $15.95+shipping.
    http://www.amazon.com/Henkel-00-09123-120-Inch-Shrink-Patio/dp/B000NHW2Z6/ref=sr_1_4?ie=UTF8&s=hi&qid=1244313830&sr=8-4 $8.39 plus shipping.

    #1507350
    mark henley
    Member

    @flash582

    Hope your feeling up to snuff these days.

    I always love these SUL/SUC threads. I think they really force us to challenge our traditional ways of thinking. I mean, it's easy to go SUL if you toss a bunch of cash at the problem.

    Using your mind, however, can be a challenge.

    I make it a point to take at least one Ultra Cheap weekend hike every season. It gives you a great feeling to reduce your dependence on gear, gear, gear.

    Let me put the old thinking cap on yet again.

    #1508498
    Gary Boyd
    Member

    @debiant

    Locale: Mid-west

    being a cheap b**tard myself I like the idea of super light / super cheap. I made a mesh fanny pack out of two toy biners and a mesh childs climbing harness sack. Total weight 1.8 oz, enough to carry a trail guide a 2+l Platy and some other odds and ends. Total cost, free…

    #1536699
    Jim Colten
    BPL Member

    @jcolten

    Locale: MN

    Just thought I'd wake up this topic a bit.

    'tis the season to check out my inventory of handwear and it's more than well worn! So it's off to my favorite glove source (the grocery store):

    These are fuzzy knit acrylic. Maybe not as warm as possum down but still very effective for 25F-35F @1.5oz and $2.99:
    knit gloves

    Not exactly PowerStretch although the exterior looks/feels kinda similar, interior kinda fleece like. Should work well when active down into the mid 20's (F again) … I'll test that on trail the next three days. 1.2oz and $4.99:powerstretch?

    Fleece gloves for the downtime when in camp. A whopping 2.0oz and the price has ballooned up to $5.99 but cold hands make time pass SO slowly:
    fleece gloves

    Now the wind will slice through all those almost like they aren't there … unless I cover them with MYOG wind shell mitts. These'll also be along on this weekend's hike. They are a prototype made with "beefy" 1.9oz ripstop. 0.9oz and cost almost nothing once you have the things needed to play the MYOG game. I'll likely replace these with mitts made using a pattern from Quest Outfitters:
    windshell mitts

    #1536969
    Lucas Boyer
    BPL Member

    @jhawkwx

    Locale: 38.97˚N, 95.26˚W

    This is what BPL/MYOG does to one's shopping habits. I don't go in to a store any longer w/o perusing the shelves for potential UL and Cheap projects. Went to the vacuum cleaner shop for a belt and noticed some baskets of goodies for a $1. So, here I am bumping elbows w/ little old ladies looking for bargains. Like those mitts, I might have enough sil left from my bivy to make a set….?

    #1537191
    Larry Dyer
    Member

    @veriest1

    Locale: Texas

    I noticed earlier in the thread that the price of driducks style ponchos were mentioned. I got one for $7 and some change at the local Academy a couple of months ago. I'll check the price the next time I'm in there to see what they are now.

    #1537208
    Frank Deland
    Member

    @rambler

    Locale: On the AT in VA

    I have a Frogg Toggs pullover. The "fuzz" coating has bunched up like fur or fuzz balls on a wool sweater only much larger. It catches and grabs onto twigs or leaves which is why I gave up using tyvek as a ground cover. Unless frogg toggs have a new smooth material, I would not use it as a ground cover.
    For a ground cover I just use a piece of coated nylon just a tab wider than my sleeping bag, or the bottom of a homemade bivy which is silnylon.

    Home Depot sells a painter's ground cloth that is easily as thick as Frogg Toggs and can be sewed. I use it when making test patterns. It is probably the heaviest ml, though I cannot remember the exact number.

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