Specifications: Size: Approx. 18c x 8.2c / 7.09 x 3.23in (Outer Material): High Quality Abrasion Resistant Soft Leather Material (Interior): High Density Memory Foam Color: Black Gender: All Model Installation Method: Installation Features: Easy to use, fast and easy to use. Seat cushion is longer, more comfortable and less fatigue. Abrasion resistant, durable, soft and elastic, odorless, not easy to deform. Eco-friendly and breathable. List: Knee Pillow * 1 Note: Due to manual measurement, please allow 1-5 / 0.04-0.2 in deviation.