PREMIUM MATERIALS: made from BPA-free, polypropylene plastic. Non-absorbent and gentle on knives. Engineered to maintain shape over time. HIGH PERFORMANCE: perimeter trench to collect excess liquids. Non-slip edges for stability and control. Reversible to double the cutting surface. DISHWASHER-SAFE: for easy cleanup. GUARANTEE: includes a Lifetime Limited Warranty and one-year hassle-free replacement.