Great material to work with just wish it was not as expensive.
The title makes it clear.
0.8 oz Dyneema Composite Fabric
This is fairly lightweight and easy to work with. It's 30% lighter than the 1.1 material Hyperlite uses for their dry stuffsacks, but I was easily able to produce (relatively) air tight sacks from this .8 material. It'll be interesting to see how they stand up to field usage, though.