Mens 3D Coolmax Gel Padded Riding Bicycle Cycling Underpants Shorts Underwear 80% nylon + 20% spandex Material80% nylon + 20% spandex Great padding is thick and ideal for beginners. Crotch pad's surface is smooth, coolmax microfiber that is laminated to foam and tricot. Soft Coolmax microfiber pad will cushion your bike ride. Breathable and Comfortable. Machine wash.