1. We've tested overnight packs this big and light before, but none as stable as the 2.3-pound, 2,800-cubic-inch Exos 46. The usual ultralight materials and buckles are in play, but it's the suspension systema superlight aluminum skeleton securing a mesh back panelthat makes the Exos stand out. In addition to keeping the load taut and secure, the system allows for breezy ventilation.
2. Though light, the Exos 46 isn't a spartan sack; it's got side compression, pockets galore for everything from a shovel to snacks, and a smart shoulder mount for stashing trekking poles. There are also additional front compression straps and an adjustable tool attachment that's big enough to carry tent poles. "Considering it's barely there, I can't believe how tricked out this pack is," gushed one tester.
3. It's versatile. The Exos 46 can double as your go-to daypack, but it's also just big enough for overnighters. It was the perfect size for a daylong mountain-bike ride from Boulder up to Winter Park via Rollins Pass. Just don't overload itno more than 35 poundsand be gentle with the lightweight buckles and material. It's also available in 2,050-cubic-inch and 3,500-cubic-inch versions. (2.3 lbs) $179 ospreypacks.com