TUSA RF20 Reef Tourer Platina Full Foot snorkelling fin. The RF20 is a super thin, lightweight design ideal for snorkelling and travel, yet it generates maximum performance and comfort. Built with TUSA quality, the foot pocket is made with a soft, durable T.P.E. compound designed for comfort. Innovative hydrofoil design and hybrid rib produce greater forward motion (lift) both on the surface and underwater. 20 degree Angled Blade Design for maximum efficiency and propulsion. Open-toe full foot pocket provides superb comfort and support. Multiflex blade provides powerful propulsion while reducing fatigue. Soft and durable T.P.E. foot pocket for a comfortable fit.