The multimat thermal trekker 10xl is designed for year round use particularly when camping much heat is lost through your airbed or mat this mat is different the metalised reflective layer of polyethylene film provides extra insulation and helps keep you warm all night long the thermal trekker xl is larger than most mats being two inches longer and two inches wider to provide extra comfort it still only weghs 265g and is prefect for guides or other youth groups why buy me i am light warm big and