Shires Karben Ultra Grip FX StirrupsThoughtfully proportioned and carefully balanced, the Karben Ultra Grip FX Stirrup combines attractive aesthetics with reassuring safety benefits. Retaining form under normal circumstance, in the event of a fall the outer safety arm flexes under pressure, allowing escape of the foot and reducing incidence of serious injury to the rider. Following release, the rubber arm retains its original shape and purpose as a supportive lateral arm. The stirrup is