Champion Women's Smoothie Sports Bra Cup and Strap Extensions Back Frame: 86% Polyester, 14% Spandex; Strap Extension Frame and Center Inner Linings: 100% Nylon; Strap Pad Frame and Center Linings: 100% Polyester; Cup Lining: 92% Polyester, 8% Spandex; Strap Extension Lining: 75% Cotton, 25% Polyester; Sling and Back Lining: 70% Nylon, 30% Spandex Imported Not applicable sports-bras closure Machine Wash Lightweight fabrics provide high support Convertible comfort straps for versatility Adjustable straps for customized fit Shaping side cups support without bulk Seamless cups to reduce chafing