If you suffer from back problems, or know someone who does, then you know how difficult it can be to have a job with extended periods of sitting. Fix the problem with this ergonomically designed Back Chair!Reduce stress on the lower back by shifting the weight to the knees and pelvis. Provides comfort with thick cushions and an adjustable angle between the knee pad and seat. Upholstered foam seat cushion and knee pad with manual height and angle adjustment. Dual wheel carpet casters. Black steel frame with Grey upholstery.