We know how challenging it can be to maximize efficiency and keep your outdoor gear protected on multi-day backcountry trips. PackStack PRO™ is a modular packing system designed to optimize pack storage, protection, and organization. With seam sealed waterproof CORDURA® fabric and a waterproof YKK zipper, PackStack PRO™ is designed to keep your essential gear dry or isolate items that require a safe storage away from moisture. Whether backpacking, day-hiking, camping, climbing, ski-touring or hunting – PackStack PRO™ will optimize your packing experience regardless of the activity. Staying organized saves you time, so you can spend doing what you enjoy.