I do a lot of road walking for training. This means walking in hot weather now.

Today, I tried out my 661 Radiator Core Cooler I use when riding the motorcycle in hot weather.



It has those moisture beads inside you see in flowers from the florist. Soak it in water for 10 minutes the night before. Wear it under the shirt and it will cool for about 12 hours. It feels like having a swamp cooler under my shirt. It feels dry to the touch, but it works great.

It's not something I would wear a heavy pack with as it might squeeze the beads out of the seams. But it would great for a day hike in hot weather.
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