Cressi Rondinella Fins for Snorkeling and Swimming Italian Quality Since 1946 Non-vented blade positioned on top of the full foot pocket to ensure more propulsive force during kicking Blade made in soft and flexible polypropylene very light Foot pocket is coalesced with the blade to form-as-one with the blade. Made in soft thermo-rubber material Comfortable foot pocket with a heel pull-tab to make donning and offing easy Easy to use, not too demanding on the user, and perform generously. Made in Italy