A W cooling type that uses a gel pack that is frozen and a cover dripped in water. The cover and frozen gel will help you cool the cold of the ice to your skin. The skin side of the cover is made of smooth mesh material. The length of the cover can be adjusted with a stopper (safety hook) to fit your neck perfectly. The gel pack can be frozen and reused. The cover has been treated with antibacterial and deodorizing properties. Washable and reusable hygienic. Not all bacteria are antibacterial. The size is suitable for both children and adults. Can be used for people up to 19.7 inches (50 cm). The navy dot pattern is timeless and can be used by both men and women.