Multimat s camper double 25 is a self inflating mat with a 3 season rating twin valves allow self inflation at double the rate or deflation and when we say double we mean double it s nearly 2 5x the width of the standard mat at a whopping 4ft 3ins wide and more than six feet long to help you get a good night s sleep it is designed with a fold down the middle which allows for a thicker single mattress option if desired another benefit is that it can be rolled up to just 2ft 3ins long and 7 5ins t