Fleece and wool are my two main choices with wool being my favorite. Filson makes a great hunting coat with 25 oz. wool I believe (must be dry cleaned tho). Woolrich has the camwoolflage series that are made with somewhat lighter wool (like 18 oz. or some such). Cabelas has a washable wool hunting jacket / coat that's pretty nice. They can be pricey but less than the customs (i.e. Sleeping Indian).