88% recycled polyester, 19% spandex UPF 50+ To make the product last longer, we suggest rinsing it after each use to get rid of any salt/chlorine residue Recycled polyester is a more sustainable fabric alternative produced by recycling existing materials (like plastic bottles and packaging) Size guide HIPS (inches) 2XS 33 ⅞ XS 35 ⅜ S 37.0 M 38 ⅝ L 41 ¾ XL 44 ⅞ 2XL 48.0 3XL 51 ¼ 4XL 54 ¼ 5XL 57 ½ 6XL 60 ⅝ Multicolor Stretch Nylon Swimwear, Fitted Multicolor Nylon Bottoms, Beach Bottoms In Stretch Recycled Polyester, Recycled Polyester Stretch Swimwear, Stretch Swimwear In Recycled Polyester For Poolside, Stretch Swimwear For Poolside In Recycled Polyester, Stretch Recycled Polyester Swimwear For Beach, Stretch Swimwear In Recycled Polyester For Beach, Chain Harness