Billabong Beat The Heat Underwire Bikini Top. Billabong's Beat The Heat bikini top brings a vibrant floral print to an underwire bikini top with adjustable straps. In soft, stretchy, partially recycled fabric, this two-piece set is perfect for the beach or pool. O rings and sliders for adjustable straps with center back hook for closure. Rings at center front straps and seam detail at bust. No cups. Logo embroidery at wearer's left center back side seam. 78% Recycled Nylon 22% Elastane. Hand wash. Imported.