The renowned Atom, a consistent presence in Arc'teryx's lineup, excels both as a midlayer and a standalone piece in a diverse array of activities and output levels. Over time, we have refined the design to elevate performance, improve durability and extend its versatility. Its Coreloft Compact insulation retains heat when wet and endures the rigors of frequent packing and unpacking. The Tyono 20 face fabric effectively resists wind and adverse weather conditions. Additonally, the stretch fleece side panels improve ventilation and freedom of movement, solidifying the Atom's status as an iconic and reliable choice.