Medifier Swim Cap Floral Petal Retro Style Bathing Caps for Women Made of nylon,Not waterproof , breathable, Soft & Comfortable for hours of pool time Elastic material, fit for all sizes Fasion bouffant design, will never add too much bulk or weight. Lightweight, breathable, soft and comfortable Perfect handmade petals flowers design, classic and fashionable.Easy to get on and off