They run BIG in Size.Armpit –> Armpit ; S; 23.5» M; 25» L; 26.5″ XL; 29″ XXL; 31.5″SIZE GUIDEParka was made to wear over body armour. If you like true to size, order one size smaller. If you’re a L, take M.Color Woodland CamoExtended Cold Weather Clothing System (ECWCS), Gen 3 Level 7High levels of warmth, with low weight and low volumeWater and windproof treated nylon outer shellNon-bulky Primaloft synthetic down-alternative insulationDrawstring hood tucks into collarSmooth-operating zipperReinforced elbows and forearmsHandwarmer pocketsHuge mesh interior pocketsThis item was made by BAF. BAF is a US Government contractor who has permission to make items for Civilian use. This jacket is made for Civilian use and is EXACTLY the same as the one used in the military. All materials are sourced in the USA.The ECW Parka is cut extra roomy, for going over bulky body armor and multiple layers of additional cold weather clothing. At its maximum operating potential, the ECW Parka is intended to be partnered with additional components of the ECWCS: Level 1 Long Underwear, Level 2 Long Underwear, Fleece Cold Weather Jacket, and Level 4 Soft Shell Wind Jacket and Pants to provide survival capability down to -50ºF.Build your own layering system, then throw the ECW Parka on top. You’ll stay toasty through just about anything.