These are the Cressi Sub Gara 3000 LD Free Diving Full Foot Fins Made in Italy This fantastic pair of fins feature: Softer blade material makes for very flexible yet still powerful fins Outstanding Long Distance" fins as the blade requires very little effort for propulsion Less muscle effort is required for kicking so divers can use them for longer, making them perfect to use many hours in a row Softer blade is also very suitable for use in cold water, which is notorious for its tendency to stiffen materials and make them less flexible These Awesome fins have emerged from the need to offer enthusiasts increasingly powerful fins that place less strain and effort on diver's muscles. "