Warm up to the notion of sleeping on snow and cold rocks with Expeds Downmat 9 DLX air mattress. This down-filled mattress features high loft goose down with three times the insulating warmth of any mat with a similar weight, so it helps keep your backpacking and climbing sleeping bags working at their optimal thermal rating potential. Exped noted in recent studies that heat loss to the ground is often three times greater than heat loss to exposed air, which means that many climbers, snowshoe enthusiasts and winter backpackers are better off spending their money on a better mattress than warmer sleeping bags with lower temperature ratings. The Exped Downmat 9 DLX air mattress can reduce heat loss by a staggering 65, and because the mattress is insulated with down instead of foam, it packs into a diminutive 15 x 7 in. stuff sack. While the Exped Downmat 9 DLX air mattress could compress further, light foam barriers built into the mattress prevent the down from sifting through the valves or migrating between the baffled chambers, eliminating cold spots. This Exped Downmat 9 DLX includes a distinctive pump/packsack that allows quick and full inflation within minutes, so you never have to worry about the humidity in your breath dampening the down fill the down fill has a special Nocar treatment to minimize condensation throughout many seasons of use. If you want to save a few ounces and dont need a sub-zero rating, take a moment to compare features on the Exped Downmat 7.