Osprey Sirrus 24 vs. 5.11 Skyweight 36L Pack
Two carry-on travel backpacks, compared spec for spec.
Feature by feature
| Osprey Sirrus 24 | Feature | 5.11 Skyweight 36L Pack |
|---|---|---|
| Storage | ||
| 4 | Compression | 4 |
| None | Expanded Capacity | None |
| 0 | Opening | 1 |
| top | Passport | top |
| N | Passthrough | N |
| Carry | ||
| Y | Backpack | Y |
| Y | Hip Belt | removable |
| Y | Sternum Strap | Y |
| Inside | ||
| N | Laptop | N |
| 3 | Main Compartments | 4 |
| N | Organizer | N |
| Outside | ||
| × | Hard Shell | × |
| Y | Rain-fly | Y |
| 2, side | Water Bottle Holder | 2, side |
| N | Water Resistant | N |
| Material | |
| bluesign® APPROVED 210D recycled honey comb nylon, PFC/PFAS-free DWR | 330D ripstop nylon |
5.11 Skyweight 36L Pack
| Capacity | 36 L |
| Weight | 1.1 kg |
| Dimensions | 56×33×22 cm |
| Airline fit | 47% |
| Price | $200 |
Key differences between the Osprey Sirrus 24 and 5.11 Skyweight 36L Pack
- Opening: Other on the Osprey Sirrus 24; Clamshell on the 5.11 Skyweight 36L Pack.
- Hip belt: Yes on the Osprey Sirrus 24; Removable on the 5.11 Skyweight 36L Pack.
- Main compartments: 3 on the Osprey Sirrus 24; 4 on the 5.11 Skyweight 36L Pack.
Both have: compression straps, passport pocket, backpack straps, sternum strap, rain cover, water bottle pockets.
Which airlines take each bag as a carry-on
We checked both bags against the carry-on size limits of 189 airlines. 49 accept both. 24 accept only the Osprey Sirrus 24, and 39 accept only the 5.11 Skyweight 36L Pack.
Only the Osprey Sirrus 24 fits
Aer Lingus, Aeroflot, Aerolineas Argentinas, Aeromexico, Air Caraibes, Air France, Air India, Air Mauritius, All Nipon Airways, ANA, Boliviana de Aviacion, Czech Airlines, Gol Linhas Aereas, Iberia, Indigo, Interjet, Iran Air, Japan Airlines, Jet Airways, Kenya Airways, KLM, LATAM , Peach, Sky Airlines.
Only the 5.11 Skyweight 36L Pack fits
Air Asia, Air Macau, Air Wisconsin, AirAsiaX, Alaska Airlines, Allegiant Air, American Airlines, Avianca , Bahamasair, Bangkok Airways, Biman Bangladesh, Cambodia Angkor Air, Cathay Pacific, Cayman Airways, Cebu Pacific, China Airlines, CommutAir, Croatia Air, Delta Airlines, Dragonair, EVA Air, Garuda Indonesia, Hawaiian Airlines, Hong Kong Airlines, jetBlue Airways, Jetstar Airways, Jetstar Asia, Kulula, Malaysia Airlines, Mango, Qantas Airways, Republic Airways, Skywest, Inc., South African Airways, SriLankan Airlines, Trans States, United Airlines, Vietnam Airlines, Virgin Atlantic.
Osprey Sirrus 24 vs. 5.11 Skyweight 36L Pack: which should you pack?
The 5.11 Skyweight 36L Pack carries 12L more than the Osprey Sirrus 24 (24L vs. 36L), while the 5.11 Skyweight 36L Pack is the lighter pack at 1.1kg (vs. 1.2kg). For carry-on flexibility, the 5.11 Skyweight 36L Pack fits 47% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the 5.11 Skyweight 36L Pack; if you want to travel lighter, the 5.11 Skyweight 36L Pack is the better call.