Garneau Gravel II Clipless Shoes - Black Mens Size 39Garneau Gravel II Clipless Shoes Black Mens Size 39. The Gravel II an updated version of the original entry level MTB shoe features a more durable T FLEX outsole and expandable X Comfort Zone to prevent tight shoes and numb feet. Expandable X Comfort Zone stretches up to 5 mm to provide comfort and to prevent numbness T FLEX rubber outsole with berglass nylon Thermo bonded synthetic leather and mesh seamless construction upper prevents pressure points