Composite Imported MARES ADULT X-ONE SNORKELING FINS - The Mares X-One snorkeling fins are the perfect companion for globetrotters and casual snorkelers alike; designed with an open heel and a self-adjusting elastic strap, the X-One is quick to slip on and off—no fumbling with buckles, whether you're on a beach, a boat, or in the water PERFORATED FOOT POCKET - The vented shoe design helps eliminate excess water and sand quickly, reducing overall weight and eliminating the "parachute effect" that can drag you back as you kick; this smart drainage system keeps the swim fins responsive and agile in the water SHORT, LIGHTWEIGHT BLADE - A compact fin blade makes the X-One perfect for travelers; easy to pack, lightweight to carry, and effective in the water, this fin is ideal for snorkeling adventures around the world; the shorter blade length offers more control and less fatigue, especially in shallow or reef-rich environments CHANNEL THRUST TECHNOLOGY - At the heart of the X-One's propulsion system is Channel Thrust - is a technology that uses soft longitudinal inserts to create a controlled flex; this design channels water efficiently along the blade during each kick, delivering smooth, powerful thrust DURABLE YET COMFORTABLE CONSTRUCTION - Built tough for repeated use in saltwater and sun, the X-One still manages to remain comfortable on the foot thanks to Mares' ergonomic foot pocket design; the Mares X-One snorkeling fins strike an excellent balance between portability and performance