【5-GEAR ADJUSTABLE ARMRESTS】BOSSIN leather office chair features outward-folding armrests that flip down from 90° to 180°. Expands seat width from 24.8 to 46 inches, perfect for cross-legged sitting, side-lying, or lateral lounging. 【COMFORTABLE ERGONOMIC DESIGN】Backrest conforms to spine's natural curve with an adjustable lumbar cushion for targeted support. Recline from 90° to 135° and extend footrests for seamless transitions between typing, reading, and resting. 【THICKENED SEAT: SOFA-LIKE COMFORT】Both backrest and seat cushion feature thick, resilient foam for ideal softness and support. Relieves fatigue during long work sessions, delivering the relaxation of a home sofa while maintaining focus. 【HIGH-GRADE PU LEATHER】Crafted from premium imitation leather that resists scratches and wear. Breathable, waterproof, durable, and easy to clean—perfect for pet-friendly homes. Double-layer thickened high-density foam prevents sagging even after extended use. 【EASY ASSEMBLY & LIFETIME SUPPORT】Assembles in just 15-20 minutes with clear instructions. We provide after-sales support with all issues—from parts replacement to technical guidance—resolved within 24 hours.