Luna Mono Unisex Sandals rubber The protective, lightweight sole allows for a wide variety of uses from casual wear to trail running, while the overall thickness means the ankle holes can be countersunk to reduce wear on the laces. Mono Weight (single sandal, men's size 9, ATS laces, either footbed): about 4.6 oz Our MGT (Monkey Grip Technology) is a rubberized top with excellent traction and durability. For wet/moist conditions MGT is king. Luna Tech Straps are patent pending add-on ankle straps that helps keep your heel straps and ankle secure. Handmade in Seattle quality.