Thrills Ansley Underwire Bikini Top. Designed with an underwire for added shape and a secure fit, this bikini top is made from a blend of nylon and elastane for a soft and stretchy feel. The adjustable straps ensure a tailored fit, while the lightweight fabrication provides breathability. Regular fit. True to size. 80% Recycled Nylon 20% Elastane. 92% Recycled Nylon 8% Elastane lining. Imported.