ZPacks Blast 18 Backpack Review

I have used the Blast 18 and 32 extensively (50 days total use) and with varying loads and have a few comments:

"Drawcord closure string is extremely thin and may cut fabric of extension collar over the long term."

Surprisingly, it actually doesn't.

I also have a MLD Zip (2008) and would say the Zip has roughly 250 days of trail life in it, whereas the Blasts have about 150. Structural weak spots on the Blasts over the long term seem to be:

– seam loosening over time on the insides of the shoulder strap attachment seam (where it's sewn onto the back)

– tearing over time on the bottom of the pack from setting it on the ground (some abrasion is unavoidable no matter how careful you are)

Maybe a double layer of fabric on the bottom (or an even thicker version of the cuben) could solve the second issue, and some kind of additional reinforcement of the shoulder strap attachment pieces could remove these issues, perhaps increasing the life expectancy of the Blast to about that of the Zip and other nylon-based packs.

I would recommend the Blasts as a way to jump to an SUL pack while still retaining a reasonable amount of durability.

And nice article, Ryan!

The Gossamer Gear website lists the Murmur's capacity as 2200 ci, not the 1700 given in the table, making it the largest of the three. …Unless GG is the one that has it wrong.

I have one so I hope the Blast doesn't blast it out of the water on *all* counts. :)

this was when the pack was bran'new. its so shiny!
it doesnt look so pretty anymore, but its holding up. no loose threads. this was my first sub-5 trip, thanks Joe for helping me reach that milestone!

"The Blast 18 has everything I want in an SUL weekend pack: durable fabrics, light weight, plenty of capacity extended with outside pockets, and a simple design."

I don't get this SUL weekend kit idea. I fully agree of course that a lighter pack makes your outdoor experience much more enjoyable. Currently my 5 day/4 night pack weighs about 16# loaded with all my gear, food and water. Sure I have done the SUL weekend trip, sleeping on some bubble wrap and sleeping under some toilet paper :D, it is doable, but it does not make my outdoor experience much more enjoyable.

Lately I find that when I go out for a weekend bash of the Belgian hills I prefer to take more rather than less stuff. As long as my pack stays under 20# I find that I am a happy hiker and I find that I'm a less happy hiker if my pack is under 5#. Apparently there's a parabola shaped curve in my hiking happiness plotted against my pack weight. As pack weight goes down (x-axis), my happiness goes up (y-axis), but it seems that after a certain pack weight my happiness goes down again. Am I alone in this or am I just not skilled enough for SUL hiking?

Lately when I go on these weekend trips with my friend I find myself putting some more comfort items in my pack. I mean depending on the season my base weight lingers around eight#, so I find that adding some powdered coffee for in the eve or morning, adding a small bottle of good whisky and eating some fresh(er) food rather than these freeze dried meals (although there's a particular brand of these dried meals that I find taste very good) adds to having a nice weekend. Additionally on longer trips I like to cook on esbit tabs since these have a considerable weight advantage over a gas canister stove, but on these weekend trips I quite like the ease of a canister stove over the hassle of esbit tabs.

So to summarize, I only understand that on longer trips one wants to analyze every gram that has to come along on the trip, but once your weekend kit list drops below 15# or even 10#, do those last few ounces really count? Or do they start to become a disadvantage, taking away from you hiking joy? I do like the idea that the pack on my back weighs a ridiculously scant 5#, but when I wake up in the morning I really wish I had taken a few # more.

SO am I alone in this matter or are there more people that find this strange curve of declining pack weight vs hiking happiness?

Eins

EinsteinX,

You've got it right!!!
Maybe that's why they call you "Einstein." :-)

My typical weekend will look like this: Saturday early in the morning (between 7 and 8) my friend will pick me up at home. Than we'll drive 3 to 4 hours depending on where we plan to hike, arrive in a nice Belgian village, park the car, enter pub/restaurant/cafe, have something to eat.

Than the rest of the day until dark we hike, depending on the season we can stop as early as 17h or hike until 20h, whenever the sun is setting and there are still a few minutes of light left to pitch the tarp.

The next day we try to wake up before dark (but we don't always succeed) and start hiking at the first light of day. Than we hike back to the car, where we try to arrive around lunch time (13h) and have lunch in the pub/restaurant/cafe again and drive back because we both enjoy our Sunday evenings at home, to unpack, kiss the girl friend and relax a bit before work starts again the next day.

This is anything but a wilderness trip of course, but there is none of that close to where I live, but it doesn't really matter because the Ardennes hills are still a great place for a hike and I really don't mind passing through a village after two or three hours on the trail and have myself some coffee and apple pie. :D

So I agree Mark, pack weight should vary based on the goals of your trip and indeed my pack weight certainly does. Still I see little point in carrying a sub 3 # pack on a high mileage weekend trip, but sleeping uncomfortably. I'd rather add half a pound and sleep more comfortable.

However I have no doubt that any sub 5 pounders here on this forum sleeps perfectly well on such a trip. Maybe I still have to figure out how. But typically my weekend pack weighs less than 10 # (and this is no base weight, this includes water, the fresh(er) food, canister stove and the trekking poles that spend most of their time strapped on my pack, tho it does not include the whisky cuz that's my friends job). And I find it perfectly comfortable at that weight and find no need for it to weigh even less other than the kick of knowing your pack is ridiculously light.

Last Easter I did a lake loop as well (in Luxembourg). This trip we did in three days and is about 44 miles and about 11,300 feet elevation gain, which I did with my UL kit and at the end of these tough days i was really happy with my 'luxurious' TAR Z-Rest cut off. I think that with a lighter mat I would have not gotten the needed rest at night, but as I said before, maybe I still have to learn.

Eins

"Sleeping pads – you can get conditioned to a very light and thin pad, especially if you can find soft places to sleep."

That might also be an issue. I always camp wild and I like to camp late, since where I camp it is illegal to camp wild. You should use campsites. So I don't always have the luxury to find the perfect spot, either in time, or either cuz the hidden spot isn't the most comfy. I did however found a few sweet spots that were great indeed.

Eins

btw am I hijacking this thread too much?

That was my point exactly Lynn. I'm glad I'm not alone in this matter cuz I was already affraid I'd lose my BPL ranking after my posts that I don't (yet) like going SUL :D

Eins

"Sooo, since this is the Blast 18 review, I'll just say that this pack has a market – I've got the 24 version, and a number of people on this site also own them. It's got to be one of the most feature (all optional) rich packs at such a low weight."

Oh I definetaly agree that there's a market for the Blast packs. I own a GG whisper and what I don't like about it is the lack of pockets on the thing. So if I'd be looking for a new SUL pack I'd definitally have a look at Z-packs. I'm still not sure about Cuben fiber tho, for some reason a woven fabric seems more natural than a fiber reinforced film. I would however love to take a CF Blast on a hike. Can someone lend me one???

Eins

"but Eins, how can you have just one SUL pack? you need six of them!"

Oh yes I agree, but it all has to do with the $$$. This month I bought my 13th pack (I think, could also be my 14th); a really nice Osprey travel bag (with wheels) cuz I needed wheels for my job. And since at the moment I don't need a new hiking pack and really really needed wheels the Osprey got priority. However for this years fall hike I do need a lighter 4 nights/5 days pack,my standard light kit. It should be a lighter version of my home made pack, which you can see in my avatar pic <<==. But I will have to make one, cuz my specific design is not on available on the market, but I'm affraid I won't have (or want to make) time for making a backpack. This job is taking up too much time :(

Eins

I have one that I modified (I always modify!) added a about 12 in collarn now I tie a simple overhand knot to close, water tight and increased capacity, I took thelarge back pocket off, (I hang my tarp and raingear off the bottom, I seam sealed all the seams, now it is fairly close to water resistant. other than thaat a great light and tough pack. most folkd don't believe how tough cuben is! gnome

I am not SUL, but a cuben fibre pack appeals to me because having a heavier pack does pretty much nothing to increase my enjoyment of the trip. A heavier pack might be more durable, but at the kind of weights I am carrying it won't be significantly more comfortable. So would I rather carry an extra pound so my pack lasts longer? Or would I rather carry an extra pound of luxuries like fresh foods or spirits? As long as the pack is reasonable durable, I will choose the lighter pack and extra luxuries.

These 1.5 cuben packs seem to be a great blend between durability and lightweight. I do not want disposable gear, which I why I'm glad to hear that with reasonable care 150 days should be achieveable. That's quite a few years of hiking for me.

Hopefully this material is considerably stronger than regular cuben fiber.

Cuben Tech lists about 30 different product weights, almost all of them heavier than the products typically discussed on this forum. The 1.5oz/sailmaker's-yard stuff used in Zpack's Blast packs is tough stuff. I wouldn't hesitate to use it in a pack.