they are wearing under armour. It is very thin and works on compression and wicking. I have some and it is unbelieveable. I live in Ohio and it is quite cold here during the rut. I wear the u/a and layer like crazy. It is also a good scent control garment. They have it almost anywhere but @Cabelas for sure. Good luck I have alywas been told that if your hands are cold cover up your head and that is true. If you can keep your head covered you will be warmer. You will notice that in the shows they often have a bunch of hats on.. Good Luck this season.