Made of environmentally friendly PU material, non-toxic and odorless, taking care of the neck and back, it releases pressure and provides you a new experience of vertebral protection. Instead of normal lumbar support, this ergonomic back stretcher corrects waist sitting posture. 15 minutes each time, it can help relieve tension and effectively treat muscle spasm, nerve pinching, herniated disc, sciatic nerve discomfort and degeneration, and excessive bending of tight knots. While stretching and massaging the lower back, the PU cushion can reduce the pressure and tension of the spine, and its massage points can also gently massage the spine, providing maximum massage and relaxation. Designed for people of all ages, people at different fitness levels can be benefited from using and improve flexibility. Specification: Material: PU Memory Foam Size: 30.8x23x8cm or 12x9x3.15inch Height: 10.1-15cm Function: Relieve pressure and pain Package Includes: 1 x Lumbar Stretching Pillow Note: Please allow slightly 0-1cm difference due to manual measurement. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. Wish you a pleasant shopping experience!