We find that as Buzz Rickson’s is made to an original spec, the brand is small compared to modern fits; therefore we advise customers to try at least a size larger than their standard size. We recommend that you contact our stores so our helpful retail teams can offer advice and give exact sizing information before you purchase. This is the reproduction based on the liner for the M-65 Field jacket. The M-65 Field jacket came with an exclusive liner to better protect soldiers from the cold. By quilting the padded fabric, the lining was made dramatically lighter and warmer compared to previous alpaca and wool liners. It also uses a wave stitch to prevent the padding from slipping. The liner has buttonholes on the neck, cuffs, and front edges to attach to the buttons on the field jacket's interior. While a conventional M-65 liner is designed exclusively for fly-front closure jackets and thus cannot be worn by itself, this liner has a zipper and other modified specs so that it can also be worn by itself. Material: 100% Nylon Interlining: Insulation Polyester Pile (100％ Polyester) Fastener: Mil Specs Brass (Bell-shaped CONMATIC Zipper) Label: Buzz Rickson Mfg.Co., Inc. Made in Japan Buzz Rickson's M-65 Liner Jacket - Olive