All-day Comfort: Ergonomically contoured heavy duty plastic stack chair with air-vent back for optimal comfort and support Durable Materials: Heavy duty polypropylene seat features vented back and drain assistance holes for comfort and convenience Sturdy Base: Durable base stacks up to 15 high for easy storage and supports up to 661 lbs. of static weight; Non-marring glides protect flooring and ensure smooth movement No Hassle: Chair ships preassembled and ready to use and cleans with solvent and water based cleaner Product Size: 17.25"W x 21.5"D x 29"H; Seat Size: 15.25"W x 13.25"D x 16"H; Back Size: 13.5"W x 15"H Never worry about lacking seating again by having plenty of these heavy-duty plastic stack chairs around. These stacking chairs are comfortable with an air-vented back and waterfall seat edge. These durable stack chairs are built to last with a dual braced frame that can hold up to 661 pounds of static weight capacity. These chairs can stack up to 15 high for easy floor upkeep and convenient storage. Ideal for family parties, baby showers, BBQ's and more, the durable design allows this chair to be used indoors or outside for your convenience. Non-marring glides ensure smooth movement and protect hard flooring surfaces during movement.