1.Shape Up Beautiful Buttock Everyday: Memory Foam Sciatica Pillow, even if you sit for a long time, will hold your prototype and increase blood flow while maintaining support, also keep the skin smooth and supple.Size: 45 x 31 x 10cm 2. Dont collapse while sitting: soft plush material and dual temperature texture for hot and cold weather. Support mats: Even if you sit for a long time, they return to their original shape as soon as you stand up. Seat cushions are not deformed or collapse. Our pillows with washable and breathable covers. 3. APPROVED DOCTOR: Orthopedic soft seat cushion is suitable for back pain and sciatica, hemorrhoid pain or numbness while sitting, injured tailbone, spinal alignment, injured intervertebral discs, piriformis, lumbosacral spondylosis, fibromyalgia, recovery after surgery, posture improvement, posture improvement. 4. Ergonomic: The surface of the back support pillow is ergonomically shaped to distribute the body weight on the seat, this wedge pillow reduces pressure on the tailbone and relieves pain in the sciatic discs and spine. 5.Applicable: The seat cushion can be used anywhere, car, office, sofa, kitchen chair, dining area, travel. Applicable for four seasons, it is durable and not easy to deform. 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.