The combination of warm temperatures and body heat allows the water in the vest to evaporate. This creates a climate effect on the membrane of the vest, which cools your skin naturally. In contrast to conventional vests using similar cooling techniques, this vest stays dry both inside and out. When fully filled, it cools down for up to 3 days! After use, the vest should be hung up to allow moisture to drain away. Once the vest is completely dry, it can only be moved.
I have now used this vest over about 500 miles of riding, mostly in hot conditions, topping out at 107F. The first ride I did was 102F, and it felt like riding on an 85F degree day. At 107, I was comfortable (wish there were a version for helmets!). The greatest virtue of this vest, compared to most cooling vests, is that it is relatively dry (except for your own perspiration) on the inside. You don't end a hot ride feeling like a poached frog. I would say this product beats the competition by a very long shot. I wear it under a KLIM Marrakesh jacket, which has phenomenal circulation for hot weather. The combination is a total winner.
Might be good for European summer, but anything above 35C, probably not.(19.06.2022)
Anonymous1328312125
I tried this on my latest trip during the summer here in the Middle East (40 - 50 degrees Celsius during the day), and honestly it was useless. The first 5 minutes were fine, I put cold water in, but in hot weather, that cold water becomes as hot as the ambient temperature in seconds, so it was actually useless. I can only see it working if the summers you experience are in the 30-35C max. Other than that, I wouldn't recommend it. I was better off with wetting my t-shirt every 100km or so. So maybe that kind of cooling vest is best for hot temperatures.
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