ALPHA INDUSTRIES Ma-1 Knit Rib Flight Jacket in Red. - size S (also in M, XS) ALPHA INDUSTRIES Ma-1 Knit Rib Flight Jacket in Red. - size S (also in M, XS) Self: 100% nylon Filling: 100% polyester Contrast Fabric: 88% Acrylic 11% polyester 1% spandex. Made in China. Dry clean only.. Front zipper closure. Ribbed trim. Padded ripstop fabric. Side pockets. ALPR-WO116. WJK55500C1. Since setting up shop in 1959, Alpha Industries has supplied men with the best in military-inspired fashion. Formerly manufacturers of flight and terrain jackets for the Department of Defense, these Alpha Industries takes their technologies and soldier style to better suit the everyday guy.