To make it easier to find the part of this thread about the GG Polycryo / Propore Bivy I decided to give this project its own Thread.
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.
===========
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.
==
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.
