Perfect Gift - Suitable for everyone, old people, men, women, kids,wife, husbands, pets, etc. can wear and cool them off. It is a perfect gift. Lightweight, soft TPU material - We use TPU fabric with strong stitching that won't be easily torn or broken. Soft, safe, non-toxic, and environmentally friendly, with no risk of skin necrosis or frostbite. Also very lightweight, suitable for outdoor sports, outdoor work, barbecues, and various other occasions. Enjoy The Coolness - Neck cooling tube cooling time approximately 40 minutes to 2 hours. Compared with other cooling rings, our cooling ring is bigger and thicker so you can feel the coolness immediately when you put it on, no need to crane your neck to feel it. Working principle - When the external temperature is higher than 18° PCM absorbs heat from the environment for storage and makes the ambient temperature drop, maintaining it at a relatively constant temperature. Therefore, it can freeze in any environment below 18°. In water, under air conditioners (car air conditioners are also possible), refrigerators, freezers, etc. (about 10 minutes in ice water, about 20 minutes in freezer). Bring A Touch Of Coolness To The Hot Summer - AOONEG neck cooling tube is made of PCM gel, which was first developed for astronaut clothing and can actively regulate the temperature of the clothing so that the wearer can maintain a comfortable body temperature at all times. It can absorb body heat and make the body feel cool, thus achieving the effect of heat relief.Best Sellers Rank: See Top 100 in Health & Household. Item Dimensions LxWxH: 7.08 x 6.29 x 1.8 inches. Color: Blue,white. Special Feature: Lightweight, Reusable gamos, Wearable. Unit Count: 2.00 Count. Brand: AOONEG. Country of Origin: China. : B0C3M42GJ2. Manufacturer: AOONEG. Date First Available: April 26, 2023. Product Dimensions: 7.08 x 6.29 x 1.8 inches; 1.1 Pounds.