We've designed these to be compact and comfortable. We shed a few grams by using a light foam with vertical cut-outs. The rectangular shape with rounded corners feels roomy on the ground but takes up little room in your pack. The thickness is good for keeping warm through three-season outdoor use. The big valve opens and closes with a simple twist makeing it easy to deflate.
- Top fabric is 75-denier 100% polyester embossed diamond ripstop, lightweight yet durable.
- Bottom is 75-denier 100% polyester taffeta.
- CFC-free open cell foam.
Measures insulative value. Higher values indicate more warmth.