881 lb. Capacity Sled Base Stack Chair with Carry Handle and Air-Vent BackThe indoor outdoor sled base stack chair with air vent back is a practical solution when you need to have extra chairs available for special events. A heavy duty, plastic seat and back, molded in an ergonomically contoured design, provide great comfort and reinforce good posture. The air vented back on this chair allows air to circulate. A powder coated frame finish on the sled base protects it from scratches and a front support brace gives it added