TRENDBOX Ergonomic Design Rubber Bike Bicycle Handlebar Comfort MTB Grips Anti-Slip Mountain Cycling The design succeeded in cutting the pressure from long-riding down. Ergonomic design Widening the grips' the bearing surface of the hand. The aluminium inner ring keep grips tight,no worry loose or fall down. Made of High quality rubber,comfortable and no-slip. uitable for all kinds of straight grips.