Just My Size Women's Pure Comfort Lace Bra Cups, Side Sling, Strap Extension: 81% Nylon, 19% Spandex; Strap Extension Lining: 100% Nylon; Strap Pad: 100% Polyester; Back: 76% Nylon, 24% Spandex Imported Machine Wash Silky seamless fabric stretchesfour waysfor ease and freedom Knit-inlight supportprovides subtle under-bust shaping Wide straps and fuller back offer gentle all-around smoothing Wider bottom band helps prevent dig-in and roll-up No seams. No wires. No hassles. Nothing but blissful comfort