Perfect for your outdoor patio, deck or breakroom, the indoor/outdoor Robust chair provides a commercial quality product for your home or office. The heavy duty steel frame is solid welded and finished with an E-coating process that coats both the inside and outside of the stool evenly with a baked on, ultra-durable, UV resistant, epoxy based finish. The sturdy mesh seat allows water to drain straight through, preventing puddling like on other seats. BIFMA load tested to 750 lbs. without failure, these chairs are built to last a lifetime. 3 year commerical structural frame warranty.