Filling material: memory cotton.<br> S code has a diameter of 30cm and thickness of 3cm, M code has a diameter of 35cm and has a thickness of 3.5cm, and L code has a diameter of 40cm and a thickness of 4cm.<br> Sit and stand for a long time-a good cushion, one-piece memory foam, can absorb the pressure of the human body, adjust the sitting posture to a comfortable posture, without strong rebound, soft and not collapse, comfortable and natural.<br> Strictly selected knitted cotton fabric, soft and skin-friendly, universal in all seasons, comfortable and breathable, not easy to pilling and fade.<br> Slow rebound memory foam, sitting on the mat, there is no pressure on the buttocks, and the material adjusts the pressure of irregular shapes to a balanced state, creating a healthy circulation.<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store