RDX Neoprene Ankle Brace Socks Achilles Tendon Pain Support Foot Guard MMA Pad RDX non-slip MMA Socks have a unique patented design Anatomical arch support design allows foot to perform naturally Spandex monofilament coalesced elastane yarn Lycra for enhanced fit Hygienic, non-slip, sweat-absorbing for all barefoot workouts (washable) Foot Size UK:- Small 6,7,8 / Medium 9,10,11 / L 12+