Designed to encourage movement, our Ergooffile is light weight and comfortable. The memory foam seat cushion and can reduce pressure on the back of your legs for all-day comfort. The reclining design of this rocking chair works your core and legs while sitting down to help improve posture. Ergooffile Adjustable Ergonomic Balance Chair The center of this ergonomic chair can be offset by up to 10°, allowing you to sit and keep moving at all times. Provides a comfortable sitting posture while also exercising your core and staying healthy. Easy to install. No tools required Structure: Half dome support pad Breathable mesh Pneumatic adjustment Height adjustment lever Round non-slip base Product Specifications： Height: 19.92''-27.79'' Cushion width: 14.96'' Bottom width: 16.14'' Weight capacity: 220 lbs Chair weight: 16 lbs Suitable for different clients The maximum recommended weight capacity is 220 pounds, which allows customers of different weights to find their own comfort zone Height adjustable With the adjustment ring under the cushion, you can easily adjust the chair from 19.92'' to -27.79'' to better find the right sitting position. Suggested settings Easy to assemble the standing chair, without any tools, small size will not take up too much space. Simply put under the table after completion. Ergonomic design The standing chair is designed with health in mind, allowing for tilting while in use and giving your core and legs a workout while turning. You can easily adjust this ergonomic office stool to the perfect level of comfort.