Arc'teryx Atom Vest Women's Hydration Packs Similar in packable size to

Similar in packable size to a 4L system

Windproof Performance: 100% primary air combustion

For  4 L / 140 fl oz

we have refined the design to elevate performance

Stem detaches from the basket and easily stow in your cup

Arc'teryx Atom Vest Women's Hydration Packs Similar in packable size toLight, warm, highly versatile insulation performs as a standalone and midlayer. Atom Series: Synthetic insulated midlayers . Midlayer or standalone, the Atom Vest is a proven performer across a range of seasons, landscapes and activities. With its most advanced insulation, fabrics, and design ever, this evolution builds on its legendary performance. Coreloft Compact insulation retains warmth if wet and withstands years of packing and unpacking, and