Women's One-Piece Swimwear from L.L.Bean. Shop L.L.Bean for colorful Women's one-piece swimwear. Our Women's one-piece swimsuits are designed to flatter and made to last all summer and beyond . Find your perfect one-piece swimsuit in our five collections, with styles that include everything from fresh takes on classic tanks to sophisticated slimming designs all at great values. Along with great prices, you'll find our one-piece swimwear is made from premium fabrics with built-in 50+ UPF sun protection and chlorine resistance. Every one-piece swimsuit is made to move with you, yet retain its shape, swim after swim, so you get the most for your dollar and the most of summer.