US Airforce Vintage Boots No LinersThese are awesome rubber reinforced boots that will withstand the harshest of elements. They are made of canvas that zips at the front and laces for personalized added comfort. In extreme cold, canvas allows perspiration to vent out, which is why a wool liner(which breathes) is the best liner(which we also sell. Enjoy the Boreal, the Taiga, or just walking your dog around the block. Lightweight, flexible and super warm, they reduce stress(energy used)