ALPHA INDUSTRIES MA-1 W Bomber in Black. - size XS (also in S) ALPHA INDUSTRIES MA-1 W Bomber in Black. - size XS (also in S) Shell & Lining: 100% nylonFilling & Cuffs: 100% polyRibbed trim: 99% poly 1% spandex. Front zipper closure. Side snap buttoned pockets. Ribbed trim. Reversible. ALPR-WO3. WJM44500C1. 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.