This is how Special Operations Forces layer clothes for 40°F to -50°F
Helikon-Tex Urban Line Urban Tactical Clothing and Downtown Backpack Armored/Ballistic Pack for Concealed Carry (CCW), Casual Wear, Range Wear, and Urban Tactical Ops! (Videos!) – DefenseReview.com (DR): An online tactical technology and
Helikon Field Parka Soldier 2008 Camogrom Review - YouTube
Helikon Field Parka Soldier 2008 Camogrom Review - YouTube
Heinne Haynes: Helikon-Tex Field Parka Soldier 2008 - BushcraftUK