JOEAIS Ergonomic Office Chair JOEAIS is the expert of ergonomic chairs was inspired by gamers/web developers tired of sitting in low-quality office chairs. A group of engineering experts and designers brainstormed what the perfect chair would consist of and created a proxy.The design was ideally for the gamer, software developer, or anyone who spends a better part of their day in an office chair. JOEAIS Ergonomic Office Chair JOEAIS is the expert of ergonomic chairs was inspired by gamers/web developers tired of sitting in low-quality office chairs. A group of engineering experts and designers brainstormed what the perfect chair would consist of and created a proxy.The design was ideally for the gamer, software developer, or anyone who spends a better part of their day in an office chair. Adjustable Armrest Made of PU material with soft touch Upgraded Lumbar Support Auto-adjustable lumbar support is good for bad back Backrest Tension Adjustment Provide most comfortable backrest for different weights Comfortable Seat Cushion The soft and thick cushion is very breathable Ergonomic Headrest Wide headrest can be adjusted in height Durable Mute Wheel Sliding flexibly and quietly without scratching your floor Gas Lift Made of steel, passed SGS, BIFMA test, 3.9" lifting range Wide Enough Base 26.7-inch diameter provides good stability even when leaning back