This is the classic USAF nylon Ma1 flight jacket.!  
Insulated for warmth, with 4 snap-close pockets (2 outside, 2 inside), 
knit cuffs, collar and waistband, 
zippered combination utility/pen pocket on left sleeve. 
available with 2 pockets 
For emergency situations, this jacket is completely reversible to Safety Orange. 
 Available in olive or Black