Key Features Breathable mesh back for air flow and comfort.Padded fabric seat with a supportive curved backrest design.Adjustable height gas lift cylinder with a swivel base and rolling caster wheels.Fixed armrests for basic arm support during desk work. [1] (https://www.amazon.com/UMJIGF-Ergonomic-Computer-Adjustable-Support/dp/B0DSJ9C2CM),