This duffel bag has gone through rigorous field testing over the past 15 years. Labeled as the go-to bag of mountaineering athletes around the world, this duffel is built to withstand the rigors of airplane travel and the unknown perils of the great outdoors. These waterproof hardcore trekking bags keep all your gear dry and easily accessible. The 72-liter volume gives you ample space for everything you'd need for a three to four day hiking adventure. To make sure everything from the tent to ski boots will fit inside, this duffel comes with four compression straps, handy mesh pockets, and locking zippers. Versatility is it's motto since this bag can be carried one of four ways: as a backpack with comfy shoulder straps, as a duffel with Velcro wrapped handles, as a team effort with two hauling handles on either end, or strapped to a yak for the hike to Everest. The D-shaped opening and zipper flap prevent the snow and ice from getting inside.