Ideal for hiking, sports, working outdoors and pretty much any other activity where you need to stay cool or warm and dry! Snugpak 2nd Skinz Coolmax Long Johns work by mopping up any perspiration created by the active body. The superfine internal hairs search for excess moisture to absorb then wick over a larger surface area keeping the body warm when cold and cooling the body off when it starts to over-heat. So the 2nd Skinz Coolmax Long Johns don’t only adjust the body’s temperature to the climate, but also keeps the body more hygienic. The casual fit means that these are a comfortable wear and don’t inhibit movement. They also come in a handy carry case which can be used over and over again to easily transport your 2nd Skinz Coolmax Long Johns, or any other essentials needed on your trip.