This cap is made of breathable mesh material. Relive tape is placed along the center of the head. Recommended for those who wear helmets, such as at construction sites, in the transportation industry, or while riding a motorcycle. Also recommended for relaxing at home or during sleep. 【Size】 Bottom Circumference ※Stretches due to rubber S: 46cm M: 50cm L: 54cm LL: 58cm ◆Simultaneous use of [Relive Eye Mask] and [Relive Cap] is not recommended. Both the eye mask and cap target the neck and head. Since each has a strong effect, there is no need to use them together. Using them together may result in overlapping effects, so it is recommended to use only one. However, there is no problem with using it with the Relive Shirt. Recommended. Only tried on for fitting.