Made of 100% Natural Coconut Fibers and Bamboo, Safe to use in cookware and tableware. Eco-friendly, Biodegradable. High Density Oil-free Firm Bristles make it easy to scrub out stains on a variety of surfaces, perfect for cast iron skillet, steel pots, pans and dishes. Stiff but Flexible fibers are gently to surfaces, no warry hurting the coating of your pots / pans (Not Suggested for Non-stick Pans). Ergonomically-designed Handle, provides much comfortability than plastic handle. Dishwasher safe, air-dry in room temperature. Bamboo handle might SPLIT due to Thermal Expansion, which will not affect the performance of product. CONTACT US FIRST IF AFFECT YOUR USE.