This is the Tilos Voyage Full Foot Snorkeling Fins with Soft TPR Foot Pocket Fin Features: Drag reducing vents as well as TPR full foot pocket design TPR strap for excellent adjustability Soft TPR foot pocket reduces strain on user's feet Available in Black, Blue and Yellow The parachute" center thrusts the diver forward with each kick while dampening water resistence. The Voyage will keep your mind on the voyage rather than on your feet. "