The one piece swimsuit is designed for fashion-conscious swimmers. It features a hollowed-out backing. The fabric construction is 83% nylon and 17% spandex. There is an elastic component near the chest area. This is designed for extra support. 83% Nylon 17% Spandex | Light fabric (5.01 oz/yd² (169 g/m²)) | Cut out at the back Elastic straps | Runs smaller than usual Machine wash: cold (max 30C or 90F); Do not bleach; Dry flat; Do not iron; Do not dry-clean; Do not dry-clean; Do not iron; Dry flat; Do not bleach; Machine wash: cold (max 30C or 90F).