Epperson Mountaineering zipper pouch. Essential zippered pouch from the pros at Epperson Mountaineering. Lightweight yet super durable with a zip closure. Founded in Montana in 1973, Epperson Mountaineering offers backpacks + totes crafted in the USA with the most durable materials and techniques on the planet, with an aesthetic still inspired by the '70s + '80s that sets them apart from modern competitors.