At first glance this task chair looks like your basic looking office chair, but look closer. This chair lends comfort with ergonomic contoured cushioning and a back depth adjustable back. The back depth adjustable knob allow you to slide the back outward which can accommodate users with longer legs. The pneumatic adjustment lever will allow you to easily adjust the seat to your desired height. The Mid-Back Black Leather Swivel Ergonomic Task Office Chair is a comfortable desk chair with a small profile that won't take up a lot of space in your home or office.