【Soft and Squishy Low-Rebound】Features air holes for good breathability, making it suitable for use year-round. The pillowcase is 100% cotton for a gentle feel. Wash the pillowcase only; air dry the main body in the shade. 【Flat Head Prevention】Designed with low-rebound foam based on ergonomics to help prevent flat head syndrome and torticollis in babies. 【Target Age】Suitable for newborns to around 3 years old. 【Size】33 x 22 x 3cm. A simple size that is not too large, combining safety and portability.