Size S: Neck circumference:13.8", Width is 4.3"
Size M: Neck circumference:17.7", Width is 5.1"
Size L: Neck circumference:21.7", Width is 6.3"
Puts it into the water, twist it, then put it into the fridge for 10 minutes and take it out. The cooling effect of the bandana will be more obvious.
Experiments have shown that wearing a cold-feeling fabric neck will effectively produce -1°C-2°C instant cool feeling.