A completely natural option the hydrea dual sided wood nail brush with cactus bristle features a sustainable hardwood base of forest stewardship council certified wood the wood is unfinished to eliminate any irritants to nails or hands and uses intrinsically stiff cactus bristles to provide stimulating and cleaning power rows of bristles line one side to scrub hands and feet while an angled row of bristles on top are exactly what is needed to clean under the nails sized to fit well