The Gel Bead Ice Neck Wrap is made of high-quality and durable materials, with a pressurized massage effect that quickly relieves muscle fatigue while providing a refreshing and cool sensation for complete relaxation.The gel freezes faster and lasts longer than water! It starts freezing anywhere below 18°C (64°F). The cooling tube can be placed in ice water, car air conditioner, home air conditioner, refrigerator, freezer, and other cooling environments.Neck cooling tube is made of durable material and can be refrozen after each use, allowing for multiple uses. Simply put the neck wrap in the refrigerator or freezer for 20-30 minutes and enjoy cool time for 40 minutes up to 2 hours. (Cold holding time varies depending on the external environment)