Updated for 2012: When staying warm is as important as keeping your pack light, the ProLite Plus mattress is an excellent solution. Patent-pending diagonal-cut foams reduce convective heat loss, making it the ideal choice for ski touring, cold weather expeditions and winter camping. This female-specific model provides added warmth for cold sleepers. It's substantial enough to keep you comfortable while mountaineering or ski touring, yet rolls up small and light enough that you'll have no problem taking it as far as you want to go. Stuff sack included.