High-Back Mesh Desk Chair features a high-strength, elastic, nylon mesh back and a fabric-upholstered seat. Two-way adjustable armrests offer black polypropylene arm coverings. Seat and back angles can adjust independently. Other functions include ratchet back, pneumatic seat-height adjustment and 360-degree swivel. The five-star base is made of reinforced nylon and is equipped with hooded, dual-wheel casters for easy mobility.