A Portsmouth NH start up: CoolCore is introducing fabrics which claim to cool your core as you exercise.
I have used a Craft T-shirt which makes some of the same claims and found it to be my day in day out go to shirt for our recent Chamonix to Zermatt trek. Call it a good micro climate but no discernable cooling effect.
I recently purchased a CoolCore bandana and put it to the test. The
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