Arc'teryx Atom Vest - Men's Coat : Mars : ; From your favorite trails to the mountain tops, find the perfect layer with the Arc'teryx Atom Vest. Light, warm, highly versatile insulation performs as a standalone and midlayer. Atom Series: Synthetic insulated midlayers. ; Stand collar with front zipper closure. ; Sleeveless. ; Side hand pockets. ; Moisture-resistant outer face fabric. ; Breathable. ; Lightweight. ; Compressible and packable. ; Fitted. ; Straight hemline. ; 88% nylon, 12% elastane. ; Machine wash. ; Imported. | Arc'teryx Atom Vest Men's Coat Mars : LG, Elastane/Nylon/Synthetic