Nike SB is Nike's professional skateboard shoes,SB stands for SKATE BOARDING, that is skateboarding.Nike SB sale front now concentrated in the Nike SB name implies,it has the classic DUNK by blood,but it transformed into NIKE SB at the time,gave it to join a cool technology,mainly thickening of the tongue and add a Nike SB cushion.Because skateboarding is so far used the foot movement.So easy to wear off in addition to thick tongue, the increased protection.Added Nike SB is mainly taking into account the movement in the floor is the impact,to all of the Nike SB are better protected.