Enhance your performance in any season, landscape, or activity with the Atom Vest. Designed with top-of-the-line insulation and materials, this adaptable vest guarantees its greatest and most diverse performance yet. Coreloft™ Compact synthetic insulation remains warm even when wet and can endure years of packing and unpacking, while the wind and light weather-resistant Tyono™ 20 shell provides breathability and durability. Experience ultimate ventilation and mobility with stretch fleece side panels, and easily pack the entire vest into its own pocket.