For those who demand the best in class performance focused minimalist footwear that can handle the BIG adventures, the Oso Flaco is super attractive. Using our specially developed Vibram Megagrip studded tread, we've built a sandal that can handle the complex world of real adventure: mountains, rivers, trails, mud. SPECIFICATIONS Mighty Light: 7.2 oz (single sandal, men's size 9) Dig in: 7mm base + 4.5mm lugs Best in Class: Waterproof Non-Marking Vibram® Megagrip Outsole Get a grip: MGT (Monkey Grip Technology) footbed + Vibram® MegaGrip Outsole Ready to fly: Supple, easy adjust performance laces kicked up a notch by our super secure wing design. Move Natural: A free foot is a healthy foot. Always zero drop, zero toe-box, zero problems Vegan Friendly: Animal free product. Refined Simplicity: "Everything you need, nothing you don't." Made in Vietnam