1. A pillow that is too high can lead to excessive forward movement of the cervical spine, disturbing its normal physiological curvature, which results in neck pain, stiffness, restricted mobility, and even hunchback.

2. A pillow that is too low can cause the head to tilt excessively backward, impairing normal breathing and hindering blood circulation back to the head.

3. This product is available in two sizes, namely 48 * 74 * 11 cm and 48 * 74 * 13 cm (for detailed dimensions, please refer to the corresponding image of the product you need to purchase). Please choose your purchase based on your own usage habits.

4. Since the pillow is shipped under vacuum compression and arrives in a vacuum-compressed state, it may feel smooth when you open the compression bag. This is a normal phenomenon. Simply follow the instructions in the image below, gently pat the pillow core or air dry it to restore its natural fluffiness.