One of the best sources for gear knowledge is your local outfitter. They should help you find just the right piece of gear and help with any sizing issues. They usually also offer great recommendations for local hikes.
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Local Indiana Camping Stores
1603 Roosevelt Road Valparaiso, IN 46383 (219) 464-4555
Fetla's Trading Post
1457 S. State Rd. #2 Valparaiso, IN 46385 (219) 462-5221