Optimize student's comfort with an ergonomically contoured seat shell student chair with waterfall seat edge. Having comfortable seating in the classroom help students pay more attention to their teacher when not having to move around due to discomfort. The one-piece molded seat shell has a vented back to provide airflow not found on solid back classroom chairs. With a 17.5" seat height you'll cater to high school and adult education centers. These school stack chairs are built to last with a dual braced frame that can hold up to 880 pounds. School maintenance workers can appreciate student chairs that can stack for floor upkeep, these student desk chairs stack up to 20 chairs high. We consider this student stack chair to be the premier stack chair - essential for every school and classroom setting.