Composition: 82% Polyester,18% Elastane Material: Polyester For Health and Safety reasons - Swimwear is non-returnable or non-refundable Size US Underbust S 32C,32D,34A,34B 29.2-30.3 M 34C,36A,36B 30.7-31.9 L 34D,36C,38A,38B 32.3-33.5 XL 36D,38C 33.9-35.1