The Crye Precision ATO Mid Loft Jacket is engineered to deliver exceptional warmth and wind protection during static periods while preventing overheating during movement. This versatile jacket is crafted from a durable, wind-resistant nylon fabric that is both lightweight and easily packable. The Polartec Alpha Direct insulation offers a unique knit construction that eliminates the need for a lining layer, reducing bulk while maintaining high thermal efficiency. This insulation is also highly breathable, ensuring excellent ventilation during high-intensity activities in cold weather. The jacket is designed to fit over Crye Precision's G3/G4 Uniform and Aclima Baselayer Tops, and under the Compact Alpine Overwhites or any high-lofted outer layer. It can serve as a concealment outer layer in warmer conditions and an insulation layer in colder climates. The jacket features a roll-out, helmet-compatible hood that can be stowed in the collar. Made in the USA from US materials. Key Features