Luna Oso Unisex Sandals rubber This sandal can handle most advanced trails and wet conditions, whether running or walking. Weight (single sandal, men's size 9, ATS laces): 7 oz MGT FOOTBED: The Oso comes with our MGT (Monkey Grip Technology) footbed, maintaining the black, low profile, look of the naked top Lunas while improving traction and durability. For wet and muddy conditions, the MGT footbed is king. TRAIL LACES: The Oso comes with a modified version of our secure and comfortable ATS (All Terrain Strapping) laces. The ATS laces include our Luna Plug System, which consists of a soft, tubular nylon between the toes and a flat military spec nylon plug under the outsole for extended wear protection. Handmade in Seattle quality.