Material 83% NYLON,17% SPANDEX. The elastic fabric of pregnancy band are soft, comfortable and durable for pregnant womens daily wear. Sizefull range of sizes bella band from U.S Small (0-6) to U.S extra large (20-26). Please reference our customer wearing experience in the picture before choice. 83% Polyamide, 17% Elastane 32R28179C17H Package ContentInclude 2pcs maternity belly bands, 2pcs bra extender and 1 waistband extender. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.