1 pcs sleep pillow between legs. The size is 23 × 13 × 25 cm. It fits the curve of the human body and keeps your legs in a natural position during sleep. Durable, fixed design. Made from carefully selected materials to provide lasting support. The legs stay in place and do not easily shift, and unlike some pillows it will not flatten over time. Side sleeper knee pillow design. Soft curves and a heart shape fit both men and women comfortably and support the legs and knees at the same time. It can be placed wherever you need, such as on the thighs, calves, knees, or even under the neck. Removable cover and memory foam. Unzip to remove the memory foam, then wash the pillowcase by hand or machine. Note: the memory foam pillowcase is not washable. Practical use scenarios. Between the knees for sidesleep alignment of hips and spine; placed on the thighs or calves for targeted support or relief of pressure; used under the knees or neck in other sleeping positions as needed.