Ergonomic Design: Which features a unique made to mimic the human spine. The chair’s back can always manage your posture to keep your spine in alignment and supporting the lower back, no need any adjustments on your part while the supportive back,especially to encourage proper posture and alleviate lower your back pain. Various Adjustments: Various of adjusting features provides you better support while sittinging on our ergonomic office desk chair. Height adjustable arms, lumbar support, headrest. You can recline from 90° to 125° in different situations Breathable Mesh: Designed with the air-right structure seat, allows air flow that provides a cool and comfort sitting position. Cool air circulates through the mesh keeping your back sweat-free and allowing you to sit in the chair comfortably for longer periods of time compared to traditional chairs Easy to Assemble: No additional tools needed. For your convenience, all screws have extra backups. Simple instructions with pictures enable anyone to put this computer chair together in 9 simple steps! Stable & durable: Heavy duty base with smooth and silenced rolling casters, Max Capacity 250lbs