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Gregory Maven 58 Women's Backpacking Backpack vs REI Co-op REI Flash 55 Women's Backpacking Backpack

Editorial Team
Last modified at August 9, 2026
Choosing the right backpacking backpack can make or break your outdoor experience. The Gregory Maven 58 and the REI Flash 55 are both excellent choices, but they cater to slightly different needs. The Maven 58 is renowned for its superior organization and fit, making it a favorite for those who need to carry a lot of gear comfortably. On the other hand, the REI Flash 55 is lighter and offers better accessibility, perfect for those who prioritize ease of use and quick access to their essentials.

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Gregory Maven 58 Women's Backpacking BackpackREI Co-op REI Flash 55 Women's Backpacking Backpack
Maven 58 Women's Backpacking Backpack
REI Flash 55 Women's Backpacking Backpack
Capacity

XS/S: 54 L; S/M: 58 L

XS: 53 L; XS torso/M hipbelt: 54 L; S: 55 L; M: 57 L

Weight

XS/S: 3 lb 6.4 oz; S/M: 3 lb 8 oz

XS: 2 lb 10 oz XS Torso x M Hipbelt: 2 lb 11 oz S: 2 lb 11 oz M: 2 lb 12 oz

Torso Adjustability

XS/S: 14–17 in; S/M: 15–19 in

XS: 15–17 in XS Torso x M Hipbelt: 15–17 in S: 16–18 in M: 17–19 in

Hip Belt Size Range

XS/S: 24–46 in; S/M: 25–48 in

XS: 30–38 in XS Torso x M Hipbelt: 34–44 in S: 32–40 in M: 34–44 in

Hydration Compatibility

Yes

Yes

Warranty

Limited Lifetime

REI satisfaction guarantee: one year for members

Trekking Pole Attachment

Yes

Yes

Rain Cover Compatibility

Compatible; not included

Compatible; not included

Side Pockets

Yes

Yes

Hip Pockets

Yes

Yes

Sternum Strap

Yes

Yes

Load Lifters

Yes

Yes

Sleeping Bag Compartment

Yes

No separate compartment

Comfort

Maven 58 Women's Backpacking Backpack

4.8/ 5.0

REI Flash 55 Women's Backpacking Backpack

4.8/ 5.0

Comfort is crucial for backpacking backpacks as it directly impacts your endurance and enjoyment on long hikes. Both the Gregory Maven 58 and the REI Flash 55 score highly in this category, with cushioned shoulder straps and padded hip belts that ensure a comfortable carry. The Maven 58 is praised for its breathable air cushion mesh back panel and comfortable shoulder harnesses, which reduce the potential for hot spots and blisters. The REI Flash 55, meanwhile, is noted for its stiff foam and wide waist belt, which help distribute weight evenly and reduce shoulder strain. Both packs excel in comfort, making it a tie for buyers who prioritize this feature.

Fit

Maven 58 Women's Backpacking Backpack

4.8/ 5.0

REI Flash 55 Women's Backpacking Backpack

4.1/ 5.0

A good fit ensures that the backpack moves with your body, reducing strain and discomfort. The Gregory Maven 58 stands out with its adjustable torso length and women's specific fit, which allow for a custom fit tailored to your body. Buyers appreciate the extendable hip belt and load adjusters that help dial in the fit anatomically. The REI Flash 55 also offers adjustable shoulder harnesses and hip belt sizes, but some users find the fit a bit wonky. The Maven 58's consistent positive feedback on fit makes it the clear winner in this category.

Load Transfer

Maven 58 Women's Backpacking Backpack

4.7/ 5.0

REI Flash 55 Women's Backpacking Backpack

4.6/ 5.0

Effective load transfer is essential for reducing fatigue and maintaining balance on long hikes. Both the Gregory Maven 58 and the REI Flash 55 perform well in this area. The Maven 58 is noted for its alloy wishbone frames and free float suspension system, which transfer weight effectively to the hips. The REI Flash 55 also excels with its stiff foam and wraparound hip belt, which help carry heavy weights comfortably. Both packs are highly rated for load transfer, resulting in a tie.

Ventilation

Maven 58 Women's Backpacking Backpack

4.1/ 5.0

REI Flash 55 Women's Backpacking Backpack

4.2/ 5.0

Ventilation helps keep you cool and dry, which is crucial for comfort during strenuous activities. The Gregory Maven 58 features a breathable air cushion mesh back panel that offers adequate ventilation. The REI Flash 55 has a mesh material for air venting, which also provides good breathability. Both packs have similar ventilation scores, making this category a tie.

Organization

Maven 58 Women's Backpacking Backpack

4.9/ 5.0

REI Flash 55 Women's Backpacking Backpack

4.4/ 5.0

Organization is key for keeping your gear accessible and secure. The Gregory Maven 58 excels with its numerous pockets, compression straps, and separate sleeping bag compartment, making it easy to stay organized. The REI Flash 55 also offers good organization with its pockets and compression straps, but it lacks a separate sleeping bag compartment. The Maven 58's superior organization features make it the clear winner in this category.

Accessibility

Maven 58 Women's Backpacking Backpack

4.4/ 5.0

REI Flash 55 Women's Backpacking Backpack

4.8/ 5.0

Accessibility ensures that you can quickly and easily reach your essentials without having to dig through your pack. The REI Flash 55 shines in this category with its easy access to water bottles, hip belt pockets, and one-hand zipper operation. The Gregory Maven 58 offers large side zippers and external zippers, but it doesn't match the Flash 55's ease of access. The REI Flash 55 is the clear winner for those who prioritize quick and easy access to their gear.

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Conclusion & Final Verdict:

In conclusion, the Gregory Maven 58 is the better choice for those who prioritize organization, fit, and a higher capacity. It offers superior storage options and a more customizable fit, making it ideal for longer trips and those who need to carry a lot of gear. On the other hand, the REI Flash 55 is lighter and offers better accessibility, making it perfect for those who value quick access to their essentials and a lighter load. Choose the Maven 58 for comfort and storage, or the Flash 55 for ease of use and weight savings.

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