Base layers are great for keeping warm when you know its going to be gnarly cold weather day. The Nomad Cottonwood HD Base Layer Shirt is the perfect start to your layering system. Staying warm is the difference between being comfortable, and having a miserable hunt. FeaturesHeavy-weight 350 GSM high pile knitBody: 100% polyester Insert at armhole and center back to improve and enhance fitSleeve with reversed smooth side out for easy entry into additional layersArticulated elbows for dexterityAnti-microbialSilver Z Scent Supression