The summit 2538 self inflating mat from multimat has been designed to offer an incredibly comfortable and reliable mat at altitude and in season 5 conditions as part of their expedition range of mats the summit 2538 has a light weight rip stop nylon upper fabric with water repellent coating on the top and a non slip water repellent coating base layer to keep it both dry and warm this five season mat offers a unique wedge profile and warm zone for extra comfort and is supplied with a microfibre