It's not my thing, but if you like hollowing out the skulls of forest animals, then here's a fun T-shirt you can wear under your camo jacket. Just try not to get blood on it.

.: 100% cotton (fiber content may vary for different colors)
.: Medium fabric (5.3 oz/yd² (180 g/m²))
.: Classic fit
.: Tear-away label
.: Runs true to size