The women's Arc'teryx Atom SV Jacket is a warming mid-layer for the mountain. Hiking below or above the treeline is more comfortable when equipped with Coreloft insulation, thermo-mapped to trap heat where you need it most. It performs on cold days, whether it's damp and dreary or bright but windy. The FC0 durable water repellent finish sheds light moisture, deterring light rain when worn as a standalone piece.