This Product
Gregory Zulu 55
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Osprey Atmos AG 65
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Awards  Editors' Choice Award Top Pick Award Best Buy Award Top Pick Award 
Price $199.95 at REI
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$269.95 at REI
Compare at 3 sellers
$280 List$199.00 at REI$269.95 at Amazon
Compare at 3 sellers
Overall Score Sort Icon
72
84
78
77
74
Star Rating
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Pros Good balance between features and weight, comfortable suspension, inexpensiveLight-weight, comfortable with heavy loads, perfect pocket combinationLight-weight, comfortable, supportive, functional feature setLight-weight, comfortable, easily personalized, inexpensiveAwesome pockets, excellent ventilation, general comfort
Cons Less volume than packs of similar weight, attached lidTiny buckles hard to operate with glovesNo lid, back-panel lacks ventilationlacks durabillity, not made for heavy loadsNot supportive for loads over 40 pounds
Bottom Line A smaller volume pack that handles medium loads wellThis super-light pack caries loads like a pro and has just about every feature you could ever wantThis comfortable yet supportive pack has an extremely functional set of features and is one of the lightest in our testThe Features on the Flash 55 are some of the best and most versatile of all the packs in our testThis now classic pack offers incredible ventilation, an awesome set of pockets and a hug-like suspension
Rating Categories Gregory Zulu 55 Granite Gear Blaze 60 Catalyst REI Co-op Flash 55 Osprey Atmos 65 AG
Suspension And Comfort (45%)
7
8
8
7
8
Weight (20%)
7
9
9
10
5
Features And Ease Of Use (20%)
8
9
8
9
8
Adjustability (15%)
7
8
5
5
8
Specs Gregory Zulu 55 Granite Gear Blaze... Catalyst REI Co-op Flash 55 Osprey Atmos 65 AG
Measured Weight (pounds) 3.69 lbs 3 lbs 3 lbs 2.6lbs 4.54 lbs
Volume (liters) 55 L 60 L 75 L 55 L 65 L
Access Top + front U-shaped access zipper + sleeping bag compartment Top Top Top Top + sleeping bag compartment
Hydration Compatible Yes Yes Yes Yes Yes
Materials 210D Honeycomb Cryptorip HD Nylon / 210D High Tenacity Nylon 100D robic nylon w/ DWR coating 400 Robic fabric Main body: 100D ripstop nylon
Bottom: 420D nylon
Main body: 100D X 630D Nylon Dobby
Accent: 210D High Tenacity Nylon
Bottom: 420HD Nylon
Sleeping bag Compartment Yes No No No Yes
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