The Arc'teryx Atom Hoody is your go-to solution for unpredictable mountain weather and high-output adventures. This versatile women's synthetic insulation jacket features Coreloft Compact 60 insulation that keeps you warm even when wet, making it the perfect midlayer for climbers and scramblers who can't afford to have their gear fail when conditions turn soggy. The fitted design includes articulated patterning and gusseted underarms that move with you whether you're reaching for holds on the rock face or navigating technical terrain, while performance stretch fleece side panels provide crucial ventilation during intense efforts. When the weather clears or you're working up a sweat, simply stuff this packable jacket into its own chest pocket and clip it to your harness with the integrated carabiner loop. At just 320g, it's the kind of reliable, do-everything piece that transforms from essential warmth to convenient carry without missing a beat.