Was at costco the other day and they had the "new improved" wet skins.They are now claiming to be breathable.The old ones are made of 75%polyester/25%poly vinyl chloride. The new ones are 100%polyurethane. I went up from a medium to a large and the new ones are a full pound lighter.Every pound counts when I'm packen for my caribou hunt. Hope they pass the test.
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