Hands-down, the most comfortable, warm, practical, flight jacket repro for winter I currently have is the B-15A MOD picked up from my personal inexpensive jacket playground, AliExpress. https://www.aliexpress.com/item/201...ilitary-USAAF-Winter-B15-Mod/32847310896.html Hard to beat the authentic construction & stitching details / pattern, 100% cotton shell, 100% wool lining, seamless, authentic-looking wrist knits, repro blackened Conmar zip puller, etc.. A LOT of bang-for-the-buck here. The sizing is great for an import, and doesn't run small. I was surprised to find that the Chinese sellers are actually importing these over from Japan, and are made by Waiper Inc. (in the same vein as 'Houston'), since no close-ups of the label are shown in the listings. When it comes to practicality and comfort in a leather flight jacket, I would choose an authentically-patterned AN-J-3 (AAF version) any day of the week. However, my GW RW 27752 is exquisitely patterned, and quite comfortable for an A-2 as well... More so than any other specific-contract repro I've owned, and allows for a wide range of movement.