STURDY, SNUG WORK CHAIRMade for long sits over 8 hours of desk work. Micro-adjust lumbar support, flip-up arms, and a flexible headrest serve people from 5'5" to 6'2", prolonging comfort. BIFMA X5.1 certifies the reliability of its robust, durable structure, ensuring sustained benefits. LUMBAR MICRO-ADJUSTOffering 2 inches of adjustable support over 8 levels, this lower back feature aligns accurately with the L1-L5 lumbar spine, lessening lower back pressure by 50% and reducing fatigue by distributing weight evenly. LARGER, COOLER SEATThe enlarged cushion (19.3"D x 20"W / 18.5"-22.05"H), crafted from exclusive Aerovith Mesh, ensures continuous cooling while enhancing support by 30% and reducing pelvic pressure by 20%. RELIABLE BASEThe leak-proof SGS gas lift to prevent accidental sinking and ensure stable height adjustment, complemented by a durable stainless steel base that supports up to 400 lbs. DETAIL-ORIENTEDWide, non-peeling soft a