When every ounce counts, the Sea to Summit UltraLight Self-Inflating Sleeping Mat ensures a restful night's sleep without weighing you down. This rugged sleeping mat features a multi-function self-inflation/deflation valve and Delta Core-V foam technology that allows you to fine-tune your comfort level. Made from durable non-slip 30 D polyester, the Sea to Summit UltraLight Self-Inflating Sleeping Mat delivers unbeatable performance at a reasonable price.