Ergonomic and Firmer Support- Upgraded from the squishy triangular wedge bolster pillow that soon flattened out and offers no adequate support, this 3D air mesh lumbar pillow with resilient filling contours to your body curve without deformation, perfect for side, back or stomach sleepers. Breathable and Cool to The Touch- With its 3D ventilation, your breathable back pillow for sleep allows constant, refreshing airflow inside, the soft top surface won't get hot or soggy like memory foam, offering cozy and comfortable sleeping environment for a good sleep. Multifunctional- Measuring at 48X34X11cm, the total thickness could be adjusted by adding a 2cm detachable roundel to help improve spine posture, reduce strained back muscles and ligaments in supine, side, and stomach sleeping positions, also can be placed in the calf or between the knees as leg spacer. Easy Care and Durable- Unique open weave Air mesh material used in our back support pillow makes it extremely hygienic and durable, no chemical smell or odor, just throw it into washing machine to keep clean and it is super quick drying. Makes A Great Gift- Our large aesthetically designed lumbar pillow is truly a great a perfect gift to your beloved one and friends who have back problems or in pregnancy. Good gifts for Parents!