The Breezandal Is The Most Breathable Outdoor Product In The Fivefingers Collection. Designed For Use On Trail, The Megagrip Rubber Sole Compound Also Excels On Wet Rock, Making The Breezandal A Great Shoe For Use Near Rivers And Lakes. The Sole Also Contains 3D Cocoon Mesh, Offering Protection From Sharper Objects In Outdoor Environments, Like Rocks Or Acorns. This Tridimensional Nylon Mesh Is Molded Into The Rubber Sole - 3D Cocoon Disperses The Point Of Impact Of Hard And Sharp Objects, While Continuuing To Offer Excellent Proprioceptionand Dexterity. Total Thickness Of Sole: 5.7Mm Usage Best Suited For Trail Use, Also Adapts To Water.