Comfortable And Warm:The Soft Cotton Linen Backrest on This Ergonomic Office Chair Provides Support While Maintain the Comfortable Sitting in the Desk Chair Seat area Keep. Safe And Heaith:Office Chair Have Heavy-Duty Metal Base with 360-Degree Swivel and Swivel Rolling Smooth-Rolling Casters, Our Backrest can Perfectly Fit your Spine and Significantly Ease the Fatigue and Pain of Your Back. Also, our Durable Armrest Provide you More Comfortable Arm Suppor. Super Easy To Installion:Rolling Swivel Chair Comes with all Hardware & Necessary Tools. Follow the Executive Chair Instruction, you'll Found Easy to Set Up, Swivel Home Comfort Chairs Estimated Assembly Time in About 15Mins. Big and Tall Office Executive Desk Chair.