It’s the best kind of mutant. Part minimalist fast-packer, part monster hauler, the ACT Zero seemed like the perfect tool no matter what the mission. Technical peak-bagging day trip? We easily fit in a rope, ice ax, full rack, and extra layers. Multi-day expedition? No problem—the 50-liter rolltop cargo area can expand by 15 liters, and the roomy mesh side and back pockets suck up gear. Even better, the simple yet effective suspension system of removable aluminum stays and padded mesh didn’t buckle under almost 60 pounds. But it was the smart details that won us over. Bungee loops for trekking poles, not just axes. A removable lid for ultralight summit dashes. A large air channel on the back and hyper-breathable harness padding. And at this price, the pack’s a steal. One reason the ACT’s harness padding is so breathable: it was originally designed for use in Mercedes and BMW air filters. 3.6 lbs
Hauling comfort: 55 pounds
Versatility: 4.5 (out of 5)
New perk: Easily find new routes and hidden gems, upcoming running events, and more near you. Your weekly Local Running Newsletter has everything you need to lace up! .