The ATO - ALPINE TERRAIN OPERATIONS™ HEAVY DUTY OVERWHITE PANT NB provides alpine concealment, comfort and a robust combat capable design that makes it perfect for extended use during cold weather operations. Constructed from a durable ripstop nylon shell, it utilizes water resistant reinforcement in areas of high wear like the seat and lower legs. Hip pass-through pockets allow for access to underlayers. The oversized cargo pockets provide easy access to essential gear and full length outseam zippers allow for quick don/doffing. Additionally, zip thigh vents allow for adjustable airflow to reduce overheating. Designed to be layered over baselayer, midlayer and uniform bottoms. Made in the US from US and non-US materials.