PACKAGING CONTENTS 1 Sexy Plunge Bra: 100% Polyurethane foam cups, 85% Polyester, 15% Elastane fabric. 1 Pair Dyed-to-Match Shoulder Straps: 90% Nylon, 10% Elastane fabric. 1 Removable Clear Halter Strap - 100% Polyurethane. 1 Dyed to Match Low Back Converter: 90% Nylon, 10% Elastane fabric.