Due to the trace of metal action (antibacterial action), the property of copper, it is hygienic and resistant to mold and mildew. The texture is fine and soft to the touch, giving it a gentle and smooth finish. Perfect for cleaning exfoliating elbows, knees, heel skin, calluses, etc. Size: 3.3 x 2.0 x 0.8 inches (8.5 x 5 x 2 cm); Material: Hard Urethane / Copper Fine Particles, Made in Japan