Built with LaCrosse AeroForm Technology, these boots provide lightweight, flexible, waterproof, durable warmth while delivering better performance in the field than traditional bulky winter boots. The neoprene and polyurethane AeroForm shell deliver incredible warmth without all the bulk. They stay flexible and won’t crack in cold temperatures. So whether it’s ice fishing, snowmobiling, or working outdoors, these are the do-it-all winter boots built for warmth and comfort. Excellent used condition. (Only worn once!) No flaws. Men’s size 12 Please comment if you have questions. *I strive to be transparent about any flaws in the item, but if you encounter an issue, please contact me and I’ll be happy to work out a solution.