Rip Curl Coastal Instinct Triangle Bikini Top. The Rip Curl Coastal Instinct Triangle Bikini Top makes a bold swim statement with its eye-catching allover print and classic triangle shape. Designed with light support and a fully lined finish, it offers a comfortable, natural feel that’s perfect for relaxed beach days. Adjustable ties at the neck and back allow you to personalize the fit, while the minimal silhouette keeps the look sleek and confident. A standout piece for sun, surf, and summer style.95% Polyester 5% Elastane. Lining: 92% Polyamide 8% Elastane. Hand wash. Imported.