XC900v4 stands for streamlined speed. A sleek new REVlite midsole with selectively placed, aggressively lugged rubber helps to create a fast ride underfoot. And the track-inspired upper provides collar and tongue construction that delivers a snug fit made to move with you. Leave the competition behind with the updated XC900v4. The REVlite midsole offers protection underfoot and an aggressive rubber outsole provides traction and durability – a match made perfect for speed.