360° SWIVEL, HEIGHT ADJUSTABLE OFFICE CHAIR: 360° swivel seat cushion and wheels, meet various needs during use. Overall Height: 33.1 inch-37.8 inch Adjustable Seat Height: 17 inch-21.7 inch (seat to the floor) ERGONOMIC MESH OFFICE CHAIR: Ergonomic back support helps to relieve back strain, high density mesh covers backrest and cushion to keep you cool, high elasticity foam cushion makes you feel comfortable when sitting for a long time HIGH QUALITY MATERIALS: With High resilience sponge cushion, hard-wearing and high breathable nylon mesh, high-quality gas cylinder, sturdy five-star base, wear-resistant solid wheels, this professional computer chair bring you good quality assurance ARMLESS OFFICE CHAIR, EASY TO ASSEMBLE: No arms, space saving, slide into the desk without any difficulty, no restriction brought by armrest. Simple assembly design, with assembly instructions and video, can be completed in 10-15 minutes by yourself MULTI-SCENARIO APPLICATION: Comfortable desk