Material: mesh fabric Core: buckwheat + pearl cotton The touch is smooth and delicate, excellent breathability. Waist Pad Size: 48*34*11/3.5cm; Height pillow: 17*17*2 cm. Scope of delivery: 1 * waist pad Ergonomic and firm support improved from the muddy triangular wedge cushion that quickly flattens and does not provide sufficient support, this 3D air mesh lumbar cushion with elastic filling contours that adapt to your body shape without deformation, perfect for side, back or stomach sleepers. Breathable and cool when touching - Your breathable back pillow for sleep allows a constant, refreshing air flow inside with its 3D ventilation. The soft top won't get hot or damp like a memory foam and provides a cosy and comfortable sleeping environment for a good night's sleep. Easy care and durable: the unique, open woven air mesh material used in our back support cushion makes it extremely hygienic and durable. No chemical smell and no smell. You just need to throw it in the washing machine to keep it clean. And it dries super quickly. Multifunctional and ready - It can improve the posture of the spine and reduce the tense back muscles and ligaments in back, side and stomach sleep positions. It can also be placed in the calf or between the knees as leg spacers. Makes a great gift - It comes with a beautiful zip pocket. Our large, aesthetically designed lumbar pillow is really a great gift for your loved ones and friends who have back problems or are during pregnancy.