Side-by-side comparison based on expert reviews and community consensus.
Osprey Atmos AG LT 65
Best OverallREI Co-op Flash 55
Best ValuePrice
$300-$320
$199-$229
Summary
The suspended mesh back panel wraps onto the hip belt for unmatched comfort on multi-day trips. Lighter than the standard Atmos AG while keeping all the features that make Osprey the trail standard.
At $199, the Flash 55 punches well above its price with a steel internal frame, adjustable torso, and fully removable components that let you strip weight as needed. It's the go-to recommendation for budget-conscious backpackers and thru-hikers alike.
Pros
- Suspended mesh back panel wraps onto hip belt for class-leading ventilation and comfort
- ~0.5 lb lighter than standard Atmos AG 65 at 4.2 lbs measured weight
- 65L capacity with lid, front mesh pocket, side water bottle pockets, and hip belt pockets
- External straps for attaching foam sleeping pads; side zipper for easy access
- Excellent value at $199 with steel internal frame and padded mesh hip belt
- Fully adjustable torso length; comes in four sizes including large torso/small hip combo
- Removable lid, hip belt, compression straps, and pockets allow 7 oz weight savings
- Tested extensively in demanding conditions including Wyoming's Wind River Range
Cons
- At 4.2 lbs, heavier than ultralight options like the Granite Gear Blaze or Hyperlite Southwest
- Premium price tag around $320
- Less feature-rich than the standard Atmos AG 65 (fewer pockets, less adjustability)
- Thin 100D nylon body lacks durability of pricier packs; 210D only on the bottom
- Padded back panel doesn't offer the ventilation of suspended mesh designs
- Removable shoulder pocket prone to catching and falling off; barely fits large phones
Our take
If you only buy one backpacking pack, this is it. The Anti-Gravity suspension is genuinely different from everything else — testers describe it as a 'hug,' and after miles on trail, that's not hyperbole.
The Flash 55 is borderline perfect for the price. Adjustable torso, removable lid and hip belt, and a frame that handles 30+ lbs — you'd pay $100 more for marginally better materials elsewhere.
Buy
