Seat and lumbar support cushion for providing comfort and alignment throughout the work day; contoured shape fits the natural arch of the lumbar region Moveable design allows you to transfer the cushion between different chairs High-density memory foam offers firm, long-lasting ...Seat and lumbar support cushion for providing comfort and alignment throughout the work day; contoured shape fits the natural arch of the lumbar region Moveable design allows you to transfer the cushion between different chairs High-density memory foam offers firm, long-lasting support Breathable cover allows for air circulation; can be removed for machine washing Non-skid bottom helps prevent slippage and keeps cushion in place during use Product dimensions 45.4 x 35.8 x 7.6 centimeters (seat cushion, LxWxH); 37.3 x 34 x 11.9 centimeters (back cushion, LxWxH)