Chill-Its 6716 Evaporative Polymer Cooling Interior Hard Hat Liner

After soaking in water the band swelled up so much that I couldn't get my helmet on, and for me it felt cool for about a minute and then it was body temperature, had to take my helmet off for it to cool again,I threw it in the bin.

Bought this as I'm a paver, and we were having a heat warning season. Other reviews said it arrived not having any crystals in the mesh, and mine arrived also paper thin. I included a side by side of the band before and after soaking in water- it works as intended.The material inside is similar to that in diapers and feminine pads; it can absorb up to 300% of it's own mass in water. It swells and gets THICK.The coldness lasts depends on temperature; for me I have a cooler with ice for my drinks. I soak it for about 5 minutes and it stays chilly for about 3 hours. The evaporative cooling works best in dry areas: here in the Maritimes we were having himidex of over 9 degrees of difference (34 feels like 41 one day) so I don't really notice that, but when we take our breaks I just soak it again. I find I works way better than just cloth based bands (I've tried 4 others, including one our work provides).I also bought the cap piece and same - works great.This is definitely worth the price.

I've used similar items in the past, just not ones that attach directly to the headband. The material definitely is not sturdy enough not to have a terrycloth or similar band over top of it anyway so I definitely wouldn't consider it a replacement for your standard hardhat band so I think its fair to evaluate it purely on its cooling abilities. Which is unfortunately not great, it doesn't function as well with an additional layer over top of it because of the nature of how it works. It also doesn't have as much of the crystals inside of it that similar products have, this might be due to where it is being used, or it could simply be that it is cheap.That being said this is probably one of the better spots you could put this sort of a product, but it could be greatly improved by a bit more of the crystals on the inside that actually do the evaporative cooling, and made of a better material that wouldn't require an additional layer to protect it from wear and tear.Also as a sub note I wouldn't recommend such a product for someone who doesn't have a ratcheting hard hat. Because of the nature of the way these products work they will expand when saturated with water, then contract when they evaporate. This would be very annoying to deal with if you are using one of the lower end snap back helmets.

C'est un bandeau refroidissant de très bonnes qualité parcontre si vous transpirer bcp il se gonfle chose normal car c'est le système d'évaporation qui rend le bandeau frais mais si vous transpirer bcp de la tête cela peu être ennuyeux pour vous

Might as well fold up a piece of printer paper and use that under your hard hat. Super thin, does not keep you cool or feel comfortable.