I have it in my bush hat, but for £9 is not worth the effort.
You soak the the scarf in cold water, the crystal absorbs the water and expands. Wrap around your neck. Good for min 6 hours depending how warm it is.
From here:
https://www.etsy.com/uk/listing/803274736/neck-coolers-summer-neck-wear-neck-ties
You soak the the scarf in cold water, the crystal absorbs the water and expands. Wrap around your neck. Good for min 6 hours depending how warm it is.
From here:
https://www.etsy.com/uk/listing/803274736/neck-coolers-summer-neck-wear-neck-ties