DENIM. Billabong Denim Triangle Bikini Top. Featuring a classic triangle design, this bikini top offers adjustable straps for a customizable fit and secure back ties for added support. Its unique denim look provides a trendy twist on the traditional bikini, making it perfect for both beach outings and poolside lounging. Removeable bra padding. 85% Polyester, 15% Elastane. Lining: 92% Polyester, 8% Elastane. Hand wash. Imported.