Purchased to prevent head-turning preference. Washed several times with Sarasa additive-free detergent, but the child disliked it, so I am selling it. The item has been washed again and stored at home. Size: Length approx. 38cm, Width approx. 28cm, Height adjustable in three directions Material: Surface A: Cotton + Polyester (soft and gentle on the skin) Surface B: Polyester (breathable honeycomb mesh design) Pillow Core Material: Soft Tubes Features: - Height adjustable in three directions The height can be finely adjusted to match the baby's growth and sleeping position, maintaining a natural sleeping posture whether sleeping on the back or side. It supports the head firmly, helping to prevent head-turning preference and flat head, guiding the head towards an ideal shape. - Soft and elastic tube material Using special small tubes, it gently fits the baby's head. With moderate elasticity, it reduces the burden while supporting the formation of a natural shape as a head-shaping pillow. - Safe design considering the baby's skin No formaldehyde detected, and it clears strict quality standards. Furthermore, it is treated with antibacterial and anti-mite processing, making it easy to keep clean. With a flat-head prevention design, it gently supports the baby's head, aiming for an ideal head shape. - Well-ventilated and less prone to stuffiness The gaps in the tubes create airflow, making it less stuffy even for babies who sweat a lot, allowing them to sleep comfortably. - Washable & quick-drying for easy care The pillow core is machine washable. It is quick-drying and easy to care for! It is easy to keep clean and can be used for a long time as a head-shaping pillow.