Multimat Summit 25/38 Self Inflating Sleeping Mats are manufactured in the UK using the highest quality components & are extremely lightweight comfortable & warm. The top layer of the Summit Compact 38 self inflating sleeping mat is manufactured from lightweight 75D rip stop polyester; the base is manufactured from lightweight 75D PU coated non-slip water repellent polyester; the core is manufactured from high-insulating high-rebound 16kg/m 3 PU foam with lightweight vertically & horizontally drilled holes for a fuller & faster inflation. Both the top & the base have a special antibacterial ether TPU membrane that enables an air-tight seal at lower temperatures. A super fast easy valve gives 3 times the airflow of a single regular valve, allowing fast inflation & deflation. The unique wedge profile maximises torso comfort & minimises weight. Summit 25/38 self inflating sleeping mats are supplied mid-folded & rolled, with a micro-fibre lined stuff sack that can double up as a luxury pillow case, & a repair kit & retaining band