Ergonomic Design: The sleeping back support features a scientifically designed curve that closely conforms to the natural curve of the lumbar spine, providing stable support for the lower back whether you are lying on your side, back, or stomach, effectively relieving pressure on your lower back. 360° Wraparound: The sleeping adjustable back cushion features a unique wraparound structure that completely envelops the lower back, providing an immersive comfort experience and ensuring even pressure distribution for enhanced comfort during sleep and sitting. Ice Silk Cotton Breathable Fabric: The lumbar support pillow is made of high-quality ice silk cotton, which is soft, skin-friendly, breathable, and moisture-wicking. It keeps you dry and cool even after wearing it for a long time, preventing stuffiness and discomfort. Lightweight and Adjustable: The sleeping back pillow is lightweight, easy to pack, and portable. Its support position can be adjusted according to individual needs to meet the usage requirements of different postures and scenarios. Multi-Purpose Pillow: The lumbar support cushions are widely applicable to various settings, such as beds, office chairs, car seats, and sofas, making them an ideal back support companion for sleeping, long hours sitting at a desk, or long journeys.