Thanks for all your comments! We are working hard to make the product better, and it’s really helpful to read your positive and negative feedback. I’ll try to answer them below:
Our body can more easily detect the cooling effect when there’s a temperature difference between the skin and the cooling material. This happens when you first put it on, or when the material is rapidly cooled, like in the case of a wind gust or water flowing through it. After a while you may stop feeling the cooling effect, because your skin temperature approaches the one from the material and it gets used to its continuous cooling stimuli. As long as the material is wet, it will continue to evaporate water from its extended surface and it will keep cooling you. You can verify this by removing your headband and quickly touching your skin, you will feel it cooler than other parts of your body. Using a thermal camera or thermometor, are also great ways of testing this.
We were developing a visor a few years ago, but it turned out to be a very difficult manufacturing problem, with our previous method of attaching the cooling pieces to the fabric. They were kind of glued to it, so you couldn’t remove them during the manufacturing process of the visor, which limited the types of machines that could be used. With our new attaching method, the pieces can now be removed which makes things much much easier. We are starting to work with a great company, to make the visor a reality asap. We also had a tough time during the pandemic, so this development was slowed down.
We haven’t paid any athlete to use our tech. We gave them free headbands so they can try them out, if they like them, they use them in races. This has been a great way of obtaining quality feedback during the development process. The pandemic forced us to limit the amount of free product given, but we’re getting back to it.
I totally agree that we should do a non-sponsored lab test to validate the technology. We have been contacted by some research groups and that may happen very soon, not just with a headband, but with other products we are developing to have a greater impact at the core level, and not just in the local area (i.e. head).
The cooling pieces are fragile due to its graphite composition. There’s a tradeoff between durability and performance. If the piece has thinner profiles, it will be lighter and have a greater heat exchange surface area, but it will be more fragile. We are trying to find the right balance, and we are taking actions to improve the user experience. For example: offering replacement pieces, improving the protective case and communicating better how the headband should be handled. There seems to be a bit of a learning curve to the latter, because of how different our material is to regular fabrics.
I hope this helps 
Gustavo
Thanks for the reply
If/when you (finally) get the visor out, please make it compatible with current cooling pieces, so that current customers can just purchase the visor and not have to pay the hefty price of re-purchasing everything.
thank you.