Big Agnes sleeping pads are designed to provide years of comfortable nights in the backcountry. The Air Core air chamber sleeping pad has gained a huge following due to its light weight and small packed size. Performance features include durable 70D hexagonal rip-stop nylon top and 70D nylon bottom internal polyurethane coating non-breakable brass valve with plastic coated EZ-Flate™ mouthpiece and I-beam construction that eliminates welded seams to reduce cold spots and ensures quick inflation/deflation. This pad is rated to 35 degrees comfort.