Vintage US Air Force Wool Felt Flight Aviation Flying Boots 。These boots show a darkening on the exterior sole. The remainder of the boot looks brand new. The darkening just might be part of the making of the boot. These are vintage and a part of American history. The interior of the boot measures 10 3/4\". I have a 10 1/2\" foot. These fit me perfectly with just the right amount of freedom. Depending on shoe brands these can be sized at 9-10 men\'s shoe. Measure your best fitting shoe to know if these would fit you. The boots do not have a liner.