This Trouser Liner was developed as a layering option for the M65 Field Trousers. This Liner simply attaches to any M-65 Field Trousers via button holes around the waist of the liner for increased warmth. This liner was designed to be extremely lightweight for the warmth it provides. Each Liner is quilted fabric with a plain weave ripstop nylon inner and outer and filled with polyester batting. By design these liners are cut short just below the knee, allowing you unobstructed access to your boot laces. FeaturesGenuine US military issueQuilted polyester batting