Cute Cooler Rings Wearable Neck Cooling RefrigeRation Class Heatstroke Prevention, Cold Neck Collar, Summer Prevention Tool

Cool cool circle summer necessary, the internal filling cold factor continues to cool, cool

The cooling circle includes three products
The first is a low version: the filling is water, 0 degrees to freeze, continue to be cold for an hour or so, suitable for early summer, not very hot weather

The second is the upgraded version: the filling is ice crystal molecules, can be crystallized below 18 degrees, suitable for indoor workers, no air conditioning conditions, in the color of the summer with a fan use, continuous cold for two to three hours, put the refrigerator after 10 to 20 minutes can be reused, cost-effective.

The third is the high version: below 28 degrees can freeze, suitable for outdoor workers, continuous cold for two to three hours, can use water to reduce the temperature to below 28 ice to continue to use, very friendly to outdoor workers