Rip Curl Hidden Isles Triangle Bikini Top. Get ready to take your beach style to the next level with the Hidden Isles Sliding Triangle Bikini Top. Designed with a cool, recycled polyamide mesh, this bikini top features a light support, sliding triangle fit that’s perfect for a laid-back day at the beach or a surf session in the sun. The adjustable straps ensure a personalized fit, while the mesh panelling adds that extra touch of surf-inspired style. Metal logo trim. 85% Polyester 15% Elastane. Hand wash. Imported.