This olive drab USGI M65 Field Jacket Liner works wonderfully as a liner to any coat or jacket for extra warmth. We have many customers who even wear these liners as a light coat. You can also upgrade your M65 jacket for Winter by replacing your old worn out liner with this unused liner. This M65 Field Jacket Liner is made of nylon and polyester materials and can easily attach to M65 field jackets for a secure and comfortable fit.