Reinforced metal stick stabilizes the thumb. Perforeted neoprene for better breathability. Color: Black.beigeSize: S,M,L,XLMaterial:Neoprene,Nylon, Aluminium stayCharacteristic:Stabilize the CMC-and MCP-joint of the thumb.Reinforced metal stick stabilizes thumb.Perforeted neoprene for better breathability.