Madewell Second Wave Tank One Piece Swimsuit NWT. Hygienic liner in place. Approximate measurements laying flat: Pit to pit 16.5" Waistband 13" across Hips 15" across Top of shoulder to bottom hemline 27" Madewell Second Wave swim collection has a built-in feel-good factor—the fabric was made using recycled plastic. Covered in '70s rainbow stripes, this classic tank suit has a built-in shelf bra, a scoop back and a flattering legs-for-days cut. UPF 50 sun protection. Recycled polyamide/elastane. Do Well: This fabric is recycled from post-consumer waste like water bottles.