Ergonomic Backrest- The ergonomic curved shape of the backrest fits the curve of human spines,which helps to relieve back pain caused by sitting, reduce work fatigue.The armless design enables this chair to be slid under your makeup table, computer desk, office desk without any difficulty. In addition, the armless design saves space in your interior. Upholstered Leather Chair- We use soft PU leather and high elastic foam to enhance the comfort and durability of the rolling chair. This office chair is waterproof and wear resistant and will not fade over time. Easy to clean.