; Introduced by the mid-1950s, the N-3B parka was designed for USAF flight crews that were assigned to troop-transport duty in extremely cold conditions. The N-3B, also known as the Snorkel Parka, was the first Alpha Industries jacket produced for the government in 1959 and reintroduced for the civilian market in the 1980s, and it retains the severe cold-weather and polar-condition protection inherent to the original. ; Slim Fit creates a contemporary silhouette. ; Parka in a heavyweight design suitable for a sub-freezing temperature conditions. ; Heavyweight nylon-woven shell provides water-resistant, wind-resistant protection. ; Channel-quilted inner face with a warm, dense polyfill batting. ; Attached, three-piece snorkel hood with adjustable drawstring and buckle-down back. ; Deep-pile, faux-mouton lining at the hood with removable faux-fur trim. ; Full-length zip with button-down storm flap and inner draft flap. ; Raglan sleeves with inner, rib-knit cuffs. ; Inner drawstring cinches the waist. ; Signature zipper utility/pencil pocket on sleeve with red Remove Before Flight tag. ; Snap-button, mid-body pockets. ; Snap-flap hand pockets. ; Inner patch pocket. ; Extended hemline. ; Signature signal-orange lining. ; Style #MJM47505C1. ; Shell: 100% nylon; Lining: 100% nylon; Faux Fur: 60% acrylic, 40% polyester; Fill: 100% polyester. ; Dry clean only. ; Imported. Measurements: ; Length: 32 in ; Product measurements were taken using size MD. Please note that measurements may vary by size.