Why choose our lumbar support pillow？ 1. Unlike soft cushions, it has more support and correct sitting posture. 2. Unlike other back support pillows for chairs, the height of the backrest can be adjusted. 3. Different from the memory foam cushion, it gives a different feeling to the back. Product name : Lumbar Support Pillow Main material : new PP plasticsandwich cloth coverspring Strap material : rubber band polyester Specification : 15.715.75.5 inch Weight: about 2.1lb (including packaging) Structure : spring support frame backplate double back 3D mech cushion elastic band Uses : car seats, office seats Washing suggestion : The mesh cover can be removed and washed normally, and the washing temperature should not exceed 40℃ Features : Breathable and comfortable, adjustable sitting posture, lumbar decompression, ergonomic design.