Upswing Task Stool combines a modern style with ergonomic features for a comfortable, unique seating solution. Mesh back enhances airflow for breathable comfort. Padded, fabric seat provides support for all-day sitting. Adjustable lumbar support has up to 2-1/2" range for extra back support. Synchronous-tilt mechanism permits noticeable smoothness in movement. Tilt lock with tension adjustment lets you personalize tilt. Sliding seat allows 2-3/8" additional seat depth for easy, comfortable adjustment. Rest your feet on the footring to sit in an ergonomic position that reduces pressure on your back. Five-star base with casters provides effortless mobility. Chair is Greenguard certified to emit low chemical emissions.