What Our Gearhead(R) Experts Are Saying:"The Osprey Kestrel 48L Backpack hits the sweet spot I have been looking for in a two-day pack for a long time. The AirScape backpanel kept things noticeably cooler on a hot desert canyon trip where I was moving fast and sweating hard, and the Stow-on-the-Go trekking pole attachment meant I could go hands-free for a third-class scramble without stopping to lash anything down. The integrated rain cover has already saved me twice."The best backpacking trips are the ones where the pack disappears and the terrain takes over, and the Osprey Kestrel 48L Backpack earns that kind of trust quickly. The LightWire peripheral frame stabilizes loads up to 40 lbs without the rigidity of a heavier internal frame, and the AirScape backpanel keeps a channel of moving air between the pack and your back through the kind of sustained effort that turns a lesser pack into a sweaty, uncomfortable burden. For two-day summit bids, quick overnighters, and fast desert canyon miles, this is exactly the right amount of pack. The feature set covers the scenarios that matter most on technical terrain. Stow-on-the-Go trekking pole attachment lets you rack the poles in seconds when the trail pitches up and hands need to be free for scrambling. Daisy chain gear loops and bungee tie-offs run down the front for lashing extra gear, a zippered sleeping bag compartment keeps the bottom organized, and stretch mesh pockets on the front and sides swallow a rain jacket or a water bottle without requiring the pack to come off. The integrated rain cover stows until the sky opens up, and StraightJacket compression straps keep the load tight when the pack is not running full.