The Oso = the Bear our most rugged and built outdoor adventure platform to allow for the gnarliest trails on the most epic adventures. If you are looking for something that can handle the harshest terrain and will keep your feet safe from the dangers below, the Oso is for you. Weight: 9.2 oz (single sandal, men's size 9). Thickness: 13MM base + 4.5MM lugs. Sole: Non-Marking Vibram® Megagrip Outsole + Vibram® Midsole. Footbed: MGT (Monkey Grip Technology). Laces: Performance Laces 2.0 *Patented. Vegan Friendly: Animal free product. Made in Vietnam