These thick Boot Liners are designed to fit inside the U.S. military ECWS Boot System. Perfect for lining your own winter Pac Boots, too. Made to top U.S. military specs. Enjoy extra warmth during long days off the grid and far from your wood stove. Thick, heavyweight wool felt Small fits Men's boot sizes 5-7 Medium fits Men's boot sizes 8-10 Large fits Men's boot sizes 11-13 Get your pair now!
