Seat Cushion Memory Foam Seat Chair Cushion for Back Hip Pressure Relief Ergonomic Designs All-Around Pressure Relief Say Goodbye to Fatigue Removable and Washable Cover Easy to Store and Carry Ergonomic Cushion Filling Weight: ≥ 0.95 lbs / 0.43 kg,Item Model Number: SS-1,Cover Material: Polyester,Product Weight: 1.26 lbs / 0.57 kg,Number of Cover: 1 PCS (Black),Filling Material: Memory Foam,Product Dimensions: 17.1 x 13 x 3.27 in / 435 x 330 x 83 mm