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 specially developed Vibram Megagrip studded tread, these sandals are built to 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 lugsBest in Class: Waterproof Non-Marking Vibram® Megagrip OutsoleGet a grip: MGT (Monkey Grip Technology) footbed + Vibram® MegaGrip OutsoleReady 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 problemsVegan Friendly: Animal free product.Refined Simplicity: "Everything you need, nothing you don't."Made in Vietnam Size/Fit: MENS SIZING IS NEARLY ALWAYS 1/2 SIZE SMALLER THAN REGULAR SHOE SIZE AND WOMENS SIZING IS USUALLY TRUE TO SIZE.