The Klymit Insulated Static V Sleeping Pad is a insulated air mattress for four season camping and backpacking. Hidden within the air chambers is not just the 10-12 breaths of air you've added, but synthetic fibers to boost the warmth as you sleep upon the ground. Coupled with the v-chamber design, you'll be sleeping comfy from bedtime to morning. Just 25 ounces of weight in your pack will keep you off the cold ground and dreaming all night long.