Redesigned for 2017 the best warmth to loft ratio of any self inflating backpacking mattress the therm a rest trail pro mat is a comfortable and easy to use self inflating backpacking mattress and is now lighter therm a rest added air bolsters to shave precious ounces while keeping the mattress four season warmth the trail pro features their ultralight u s sourced foam saving you weight and space in your pack without any sacrifice in comfort new this year is a regular wide size to maximize width