When backpacking, comfort is king—and comfort often comes down to two things: weight and fit. And the Exos 34 wears the crown as one of the best packs on the market. The innovative trampoline back plays a big part in this regal distinction. It employs twin support poles that run on either side of the pack, creating a massive gap of air between the pack and your back. As a result the thing breathes better than a marathon runner, adds a bit of bounce to the overall feel, and won’t chaff if you happen to load the pack over the bag’s recommended capacity.