Sidi T-1 Triathalon Cycling Shoe is made of renowned High Perfoprmance Lorica. Two strap velcro closure. Millenium II sole. Notched upper strap, so it won't come out of the D-loop. Tongue-less design, heel pull tab for fast transitions. Neoprene collar and full lining for sockless comfort. Mollded plastic heel cup, replaceable heel pad. Weight 525gm per pair.