Just My Size Women's Undercover Slimming Wirefree Plus Size Bra (J228) Cup: 83% Nylon, 17% Spandex; Inner Center Belt: 100% Nylon; Center Belt Lining And Cup Lining: 100% Polyester; Back: 92% Nylon, 8% Spandex; Sling: 70% Nylon, 30% Nylon Imported Hook and Eye closure Machine Wash Hidden slender-u panels smooth your bust and slim your profile Built-up sides and back give you a sleek silhouette