Osprey Rook 65 vs Osprey Sirrus 24
Quick take: The Osprey Sirrus 24 costs $5 less; the Osprey Rook 65 carries more (65 vs 24 liters); the Osprey Sirrus 24 is lighter (2.69 vs 3.5 lbs).
| Spec | Osprey Rook 65 | Osprey Sirrus 24 |
|---|---|---|
| Price | $205 | $200 |
| Rating | — | — |
| Type | Traditional Pack | Daypack |
| Frame Type | Internal Frame | Internal Frame |
| Capacity | 65 L | 24 L |
| Weight | 3.5 lbs | 2.69 lbs |
| Max Load | 40 lbs | Not specified by Osprey |
| Torso Fit | 18-22 in adjustable | Women's fit, 15-19 in |
| Material | 600D polyester | 210D recycled honeycomb nylon with 420D recycled nylon base |
| Back Panel | AirSpeed suspended mesh | AirSpeed suspended mesh over LightWire frame |
| Adjustable torso | Yes | No |
| Ventilated back | Yes | Yes |
| Raincover included | Yes | Yes |
| Hipbelt pockets | No | Yes |
| Removable lid | No | No |
| Hydration sleeve | Yes | Yes |
| Fits BV500 bear can | Yes | No |
| Warranty | Osprey All Mighty Guarantee (lifetime) | Osprey All Mighty Guarantee (lifetime) |
Pros & cons
Osprey Rook 65
- ✓The most common Reddit take: it delivers 80% of the Atmos experience for 55% of the price, making it the default budget recommendation.
- ✓A genuine suspended-mesh ventilated back panel at this price is nearly unique — competitors at $200 use flat foam.
- ✓The adjustable torso plus fixed but well-shaped hipbelt fits a wide range of first-time backpackers.
- ✓Includes a raincover, integrated and stowable, that budget rivals make you buy separately.
- ✓The 600D polyester is thick and confidence-inspiring; owners report it shrugging off years of rental-fleet-level abuse.
- ✓Covered by the same lifetime All Mighty Guarantee as Osprey's $400 packs.
- ✓At 3.5 lbs it is actually lighter than the Atmos AG despite costing far less.
- ✓The simple top-loading design with a fixed lid means fewer straps and less to fiddle with for new hikers.
- ✗No hipbelt pockets is the number-one complaint — snacks and phone require stopping or aftermarket pouches.
- ✗The hipbelt is not interchangeable or adjustable in length, so fit is less dialed than pricier Ospreys.
- ✗The heavy 600D fabric keeps the price down but makes the pack feel dense for its size.
- ✗The fixed lid can't be removed to save weight or run low-profile.
- ✗Load comfort degrades noticeably past 35-40 lbs compared to the Atmos or Aether.
- ✗Only one main-compartment access point — no side or bottom zips at this trim level.
- ✗The suspended mesh panel slightly bows the internal space like other trampoline designs.
- ✗Colorway options are limited and utilitarian compared to the flagship lines.
Osprey Sirrus 24
- ✓The AirSpeed suspended mesh is the best-ventilating back panel available in a women's daypack this size.
- ✓A rain cover is included, which the pricier Tempest does not offer.
- ✓A 420D recycled base is real reinforcement on the panel that takes the most wear.
- ✓The 15-19 in torso range is genuinely women's-specific rather than a shortened unisex fit.
- ✓Hipbelt pockets are included and sized for a phone.
- ✓A 36 L sibling shares the same suspension for overnight use.
- ✓210D honeycomb nylon is more durable than the 100D fabrics on the lighter Osprey daypacks.
- ✓Osprey's All Mighty Guarantee applies.
- ✗At 43 oz it is the heaviest pack in this comparison group and 8 oz heavier than the Tempest 22 for 2 L more.
- ✗$200 is high for 24 L, and the Gregory Juno 24 undercuts it at $150 and 31 oz.
- ✗The suspended mesh consumes depth, so usable volume is less than 24 L implies.
- ✗No manufacturer maximum load is published.
- ✗The 36 L size has no independently measured weight published.
- ✗The mesh panel is harder to repair in the field than a foam panel.
- ✗The frame makes it bulky to pack inside luggage.
- ✗Current pricing and the full Stratos/Sirrus size run are poorly documented; only the 24 and 36 could be confirmed.