Big Zip EVO 3L 3 x 3 x 8 in the Winter Hallena features a

the Winter Hallena features a relaxed fit with interior waistband drawcord

Collects stories and photographs the mountain has inspired since the first attempt was made to reach the summit in 1921

reflective ThermaCapture™ layers give the XTherm™ air mattress true four-season warmth without the weight or bulk usually found in a winter-worthy mattress

Find your fit using the adjustable shoulder straps

Big Zip EVO 3L 3 x 3 x 8 in the Winter Hallena features aIntroducing the Big Zip EVOthe latest evolution in taste free hydration. The Big Zip EVO delivers a significantly higher flow rate than previous Platypus reservoirs and a host of new features, making it a great option for backpackers, hikers, and mountain bikers.