New plastic protection added to the outside calf wrap New PU synthetic leather added to the inside knee and calf wrap PE foam inner/outer calf for maximum balance and reduced weight 3-Point flex: boot, knee and thigh. Helps contour the leg and close the 5-hole Quick slide knee cradle Flat front profile blocking design for better rebound control 3D nylon calf design for optimized support in butterfly position Square outer block increases blocking surface Shallow boot channel for maximum coverage at the boot area