Eforstore Swimming Caps Long Hair Swim Cap Pleated Cloth Fabric Bathing Hats Lycra Beanie Hat Adult Men Women Made of nylon, breathable, soft and comfortable. Not waterproof. Elastic material, fit for all sizes. Protect your hair and ear while swimming. Fasion bouffant design, will never add too much bulk or weight. Quickly and easily to take on and off without troubles.