mateoredwrote a review of CamelBak Alpine Explorer Hydration Pack - 1648cu in on March 4, 2014
Familiarity: I've put it through the wringer
Fantastic day pack. I've used it for long and short day hikes, skiing, traveling, work, bike commuting, carry on luggage, you name it. If you need one really big compartment in your day pack, this is not the best choice, but it has a lot of other great features. The venting works really well on a hot day, the 3L water bladder is great, the pockets are well organized, the fit is very comfortable for me, and the fabrics and construction are extremely durable but still pretty light. You can load this thing up pretty good and carry it all day without a problem. Note that the chest strap is good but the waist strap is not very substantial (like almost all day packs).
Note 2: it's yellow in real life, not green.