Second Wave Ribbed High-Cut Bikini Bottom Madewell Second Wave swim collection has a built-in feel-good factor—the ribbed fabric was made using recycled material. And the look-good factor is no joke either: With its belly-button-grazing waist and a high-cut leg, this bikini bottom has an old-school aerobics vibe. Size: S Color: Gilded Chartreuse - Moderate coverage. - UPF 50 sun protection. - Made from 80% pre-consumer recycled nylon/20% elastane. - Do Well: This fabric is recycled from pre-consumer nylon waste like fishing nets, fabric scraps or carpet. - Swimsuits are machine washable, but hand washing is recommended as it helps keep the fabric and the shape of the suit looking newer, longer. - Import. - Madewell.com only. - MD402