Made of polyester. Breathable and comfortable. Anti-slip silica gel material, microfiber cloth, with shock absorption effect. It is non-slip and sweat absorption, durable and practical. And it is easy to take off, multi-purpose design, comfortable effect. It is machine washable for both men and women for all-season, suitable for outdoor activities such as cycling, hiking, mountaineering, camping and motorcycling. 6.5" L x 5.12" W x 0.9" Thick