the Czechs came out with the M97 service uniform and ones like this in a service blue colour are intended for more administrative and guard duties than use in the field

Vintage Militaria / Dated 1999

There's a hem and waist drawstring so you can really help insulate yourself in cold windy weather

I'd recommend the lining

Having said that

US Army Air Force WW2 Ike Jacket Battle Dress - 38R Shirt the Czechs came out withAt a glance 100% Wool Body Material 2 Button Chest Pockets & 2 Internal Slit Pockets Button & Popper Front Closure 7 Golden Chevron Overseas Service Bars 9th Air Force Sleeve Patch Staff Sergeant Rank Patches "MUC" Meritorious Unit Citation Award Patch "Raptured Duck" Honourable Discharge Patch US Air Force Corps Enlisted Men Collar Lapel Discs Side Waist Adjusters Button Cuffs Iconic WW2 Kit, Ideal for Reenactors or Collectors Shoulder Epaulettes