Osprey Sirrus 24 vs Osprey Kyte LT 45
Quick take: The Osprey Sirrus 24 costs $10 less; the Osprey Kyte LT 45 carries more (45 vs 24 liters); the Osprey Sirrus 24 is lighter (2.69 vs 4.02 lbs).
| Spec | Osprey Sirrus 24 | Osprey Kyte LT 45 |
|---|---|---|
| Price | $190 | $200 |
| Rating | 4.5★ (11) | — |
| Type | Daypack | Traditional Pack |
| Frame Type | Internal Frame | Internal Frame |
| Capacity | 24 L | 45 L |
| Weight | 2.69 lbs | 4.02 lbs |
| Max Load | Not specified by Osprey | 40 lbs (18 kg) |
| Torso Fit | Women's fit, 15-19 in | Sliding harness yoke, 5 in of adjustment |
| Material | 210D recycled honeycomb nylon with 420D recycled nylon base | 100% recycled 210D nylon body with 100% recycled 600D polyester base |
| Back Panel | AirSpeed suspended mesh over LightWire frame | AirScape ridged foam over perimeter wire frame |
| Adjustable torso | No | Yes |
| Ventilated back | Yes | Yes |
| Raincover included | Yes | Yes |
| Hipbelt pockets | Yes | No |
| Removable lid | No | No |
| Hydration sleeve | Yes | Yes |
| Fits BV500 bear can | No | No |
| Warranty | Osprey All Mighty Guarantee (lifetime) | Osprey All Mighty Guarantee (lifetime) |
Pros & cons
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.
Osprey Kyte LT 45
- ✓Osprey states the women's fit is a distinct construction -- narrower shoulders and contoured straps -- not a shortened men's harness.
- ✓$200 for 45 L with adjustable torso and an included raincover undercuts most women's packs of this size.
- ✓The stated 20-40 lb load range is broad for a pack in this price bracket.
- ✓Five inches of sliding-yoke adjustment is unusually generous in a women's-specific pack.
- ✓Priced identically to the men's ladder, so the women's fit carries no premium.
- ✓Raincover is integrated rather than sold separately.
- ✓The same four volumes as the Kestrel LT, so the range is not truncated the way women's lines often are.
- ✓Osprey's All Mighty Guarantee applies.
- ✗4.02 lb for 45 L is heavy, and it is nearly the weight of the men's Kestrel LT 65 which holds 20 L more.
- ✗The AirScape contact panel trades ventilation for stability, which is the wrong trade in hot weather.
- ✗Only the 45 L has a published weight across the whole Kyte LT ladder.
- ✗As a simplified pack it has fewer organisational features than the standard Kyte.
- ✗New for 2026, so there is no long-term durability record.
- ✗Hipbelt pockets are not confirmed in any source consulted.
- ✗Published weights for the men's and women's line come from different sources and are hard to compare directly.
- ✗Bear-canister fit is not stated by Osprey.