Fetlock boot approved for young horses by FEI The new Young Jump Absolute Olympus fetlock boot is specifically approved for young horses by the International Federation and can also be used on horses of all ages. The Double Density polyurethane and EVA inserts are wider to provide maximum protection of the fetlock. Anatomic shockproof polyurethane shell Materiale double density Double Density EVA protection Aerox breathable neoprene padding 3D mesh ducted fabric 5 cm double velcro closure