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Osprey Manta 24 vs REI Co-op Traverse 35 Pack - Men's

Editorial Team
Last modified at August 10, 2026
Choosing the right hydration pack often comes down to balancing capacity against comfort and durability. The Osprey Manta 24 is a refined choice for hikers prioritizing a cool, comfortable ride on long trails, featuring a highly rated AirSpeed back panel and robust construction. In contrast, the REI Co-op Traverse 35 Pack - Men's steps up the volume with a larger 35-liter capacity and exceptional stability, making it ideal for those carrying more gear on moderate terrain. While both packs offer excellent organization and ventilation, the Manta 24 generally edges out in build quality and ease of access, whereas the Traverse 35 provides a more secure fit for heavier loads despite some concerns about long-term ruggedness.

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Osprey Manta 24REI Co-op Traverse 35 Pack - Men's
Osprey Manta 24
REI Co-op Traverse 35 Pack - Men's
Capacity

1465 cu in

2133 cu in

Weight

3.4 lb

18-20 Torso / S-M Hip: 3 lb 4 oz
18-20 Torso / L-XL Hip: 3 lb 5 oz
18-20 Torso / XXL-4XL Hip: 3 lb 8 oz

Hip Belt

Hipbelt included

Hipbelt included

Hydration Sleeve

Hydration sleeve

Hydration sleeve

Bladder Capacity

84.5 fl oz

N/A

Warranty

Lifetime

N/A

Compression Strap

Compression straps

Compression straps

Mesh Back Panel

Mesh backpanel

Mesh backpanel

Sternum Strap

Sternum strap

Sternum strap

Rain Cover

Included

Included

Frame Sheet

Framesheet

Framesheet

Side Pockets

Side pockets

Side pockets

Trekking Pole Attachment

Pole attachment

Pole attachment

Comfort

Osprey Manta 24

4.7/ 5.0

REI Co-op Traverse 35 Pack - Men's

4.3/ 5.0

Comfort is the foundation of any successful hike, determining whether you can enjoy the trail or spend the day fighting fatigue. For hydration packs, this means padded straps, adjustable suspension, and a back panel that manages heat and pressure effectively. The Osprey Manta 24 leads this category with a 4.7/5 rating, praised for its padded foam hip belt, adjustable suspension, and breathable AirSpeed back panel that keeps you cool. While the REI Co-op Traverse 35 also scores well at 4.3/5 with strong hip support and a spring steel frame, some users note it can feel less soft or uncomfortable for those with smaller waists. Ultimately, the Manta 24 offers a more universally comfortable experience for long-duration wear.

Durability

Osprey Manta 24

4.9/ 5.0

REI Co-op Traverse 35 Pack - Men's

3.9/ 5.0

Durability ensures your pack survives rough terrain, abrasion, and the elements over years of use. A strong pack should feature reinforced materials, water-repellent finishes, and robust zippers that won't fail when you need them most. The Osprey Manta 24 dominates here with a near-perfect 4.9/5 rating, highlighted by its durable water-repellent finish, heat-embossed materials, and reinforced components like an ice axe holder. The REI Co-op Traverse 35, while having some users report long-term use, holds a lower 3.9/5 rating with specific complaints about wear, fading, and damage on rugged trails. For hikers tackling demanding conditions, the Manta 24 provides significantly greater peace of mind regarding longevity.

Ventilation

Osprey Manta 24

4.6/ 5.0

REI Co-op Traverse 35 Pack - Men's

4.4/ 5.0

Effective ventilation is critical for preventing sweat buildup and keeping your back cool during strenuous activity. This is achieved through tensioned mesh panels, air channels, and suspension systems that lift the pack off the skin to allow airflow. The Osprey Manta 24 earns a 4.6/5 rating thanks to its tensioned mesh back panel and AirSpeed suspension, which buyers consistently say reduces heat and sweat. The REI Co-op Traverse 35 follows closely with a 4.4/5 rating, utilizing tubular design back panels and channels for heat dispersal that users find effective for hot weather. While both are excellent, the Manta 24's specific suspension design offers a slight edge in maintaining a dry back.

Accessibility

Osprey Manta 24

4.8/ 5.0

REI Co-op Traverse 35 Pack - Men's

4.2/ 5.0

Accessibility determines how easily you can reach your water, snacks, and gear without stopping or removing your pack. Key features include magnetic closures, side zippers, hip belt pockets, and wide-opening compartments. The Osprey Manta 24 shines with a 4.8/5 rating, offering magnetic bite valves, zippered hip belt pockets, and a vertical zipper for easy side access. The REI Co-op Traverse 35 scores a 4.2/5; while it has a wide-opening main compartment and good hydration setup, some users find it lacks multiple access points and can be difficult to reach into without undoing straps. The Manta 24's thoughtful design makes it the superior choice for quick, on-the-go access.

Stability

Osprey Manta 24

4.7/ 5.0

REI Co-op Traverse 35 Pack - Men's

4.8/ 5.0

Stability keeps your load secure and prevents gear from shifting, which is vital for balance on uneven trails. This relies on compression straps, frame sheets, and hip belt designs that lock the pack tightly to your body. Both packs perform exceptionally well here, resulting in a tie. The Osprey Manta 24 (4.7/5) uses a light wire peripheral frame and external compression straps to lock everything down, while the REI Co-op Traverse 35 (4.8/5) utilizes a spring steel frame and aggressive cinching mechanisms to bring the bag tight against the body. Whether you prefer the wire frame of the Osprey or the steel frame of the REI, both provide rock-solid stability for heavy loads.

Organization

Osprey Manta 24

4.8/ 5.0

REI Co-op Traverse 35 Pack - Men's

4.8/ 5.0

Good organization allows you to separate wet gear, electronics, and hydration supplies efficiently. This involves a mix of dedicated sleeves, external pockets, and internal dividers. Both packs are tied with a 4.8/5 rating, offering extensive storage solutions. The Osprey Manta 24 features a dedicated hydration sleeve, stretchy front pockets, and zippered hip belt pockets, while the REI Co-op Traverse 35 boasts a large main compartment, outer mesh pouches, and a beaver tail design for expansion. With both packs offering five or more distinct storage areas and specialized pockets for trekking poles and rain covers, the choice comes down to personal preference for pocket layout rather than a lack of options.

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Conclusion & Final Verdict:

The Osprey Manta 24 is the superior choice for hikers who prioritize long-term durability, maximum comfort, and easy access to gear. Its higher ratings in comfort, durability, and accessibility make it ideal for day hikes and multi-day trips where reliability is key. However, if you need more capacity for extended trips or heavier loads and value a slightly more secure fit on rough terrain, the REI Co-op Traverse 35 Pack - Men's is a strong contender, provided you are willing to accept slightly lower durability ratings and a less refined comfort profile. For most users seeking a balanced, high-performance hydration pack, the Manta 24 offers the better overall package.

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