Osprey Dyna 6 Review | CleverHiker

Bottom Line

The Osprey Dyna includes a 1.5-liter reservoir and 13 pockets of various sizes for organizing gear, calories, and layers. This pack can carry everything needed for a full day on the trails. Whether used for racing or as a daily training pack, its versatility makes it a great pack for a wide range of runners. 

Made with recycled materials, the women’s-specific Dyna and men’s Duro have easily accessible pockets and a hydration sleeve. Our only complaint about the hydration system was the absence of a magnet or clip to prevent the hose from flopping around. 

The plastic clip rail sternum strap adjustment system makes it easy to find a really secure fit, but we found the inflexibility to be slightly uncomfortable. 

Zip closures on both the front and back pockets keep things secure, and attachment points for trekking poles mean you can take this for backcountry runs — which we did in the Pacific Northwest.

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How We Tested

We tested the Osprey Dyna 6 Hydration Vest on runs of varying lengths on trails in the Pacific Northwest. We used it for daily training as well as longer days in the backcountry.

Comfort & Fit

While we loved the environmentally responsible use of 100% recycled materials in the Dyna and Duro, we found the fabric to be somewhat rough on exposed skin. While it’s not an issue on most runs, it might present a problem on hot days when running shirtless.

We found the plastic rail for the sternum adjustment to be versatile, featuring a snap-in dual chest strap system, but it was stiff and inflexible, which made it a bit uncomfortable.

Additionally, we found the clips to be somewhat fussy to use. We appreciated the women’s specific design of the Dyna but found it to run small, making it difficult to get the pack clipped when it was full. Some runners may want to consider sizing up, especially if they’re measuring close to the upper limit of a size.

The padding across the shoulders enhanced comfort with heavier loads, which we found to be beneficial during long runs.

Functionality

We were truly impressed by the easy-access pockets of varying sizes while on the move. All our essentials, like gels, salt tabs, phone, and gloves, were readily accessible during our activities.

During a multi-hour excursion, we never had to stop to search for a snack or salt tabs. A full-size zipper pocket kept our phone secure.The slip-in clip for the hydration reservoir was simple to use, making refills easy.

However, we felt the absence of a clip or magnet for the hose. Without it, we had to tuck the mouthpiece into a pocket while moving to prevent it from bouncing around.

The hydration sleeve could also benefit from some insulation to keep heat from transferring to the included run-specific 1.5-liter reservoir from our body.

We also appreciated the attachment points for trekking poles and an ice axe, as well as an included safety whistle, which makes this a versatile choice for mountain adventures as well as trail runs.

Performance

We found the performance of the Dyna to be lacking in security. Despite adjusting the sternum straps, we couldn’t prevent the pack from shifting upward in the front as we ran. We continually tugged it down, which distracted us from enjoying our run.

Additionally, we noticed that the pack bounced excessively during our runs. The bladder’s easy clip system, while quick and simple to use, failed to keep the reservoir in place. The top of the bladder bounced and sloshed no matter what adjustments we made.

When we swapped flasks for the reservoir, we significantly reduced the bouncing and shifting. For runners who prefer a flask system, this vest may perform well.

Durability

The recycled materials that comprise the Dyna and Duro are thicker than most running vests available, resulting in an exceptionally durable vest.

We found that the stretch mesh pockets have plenty of give for stuffing gear and snacks, yet they remain shaped and do not stretch out of form despite repeated use.

The thicker mesh is also puncture and snag resistant, making it a reliable vest for trails where obstacles may pose a challenge. If you’re searching for a long-lasting, versatile running vest that can handle both long days and shorter runs, this may be the pack for you.

Breathability

The drawback of the thicker, more durable fabric is a loss of breathability. The Dyna/Duro was the least breathable of the packs we tested, taking longer to dry and vent heat than the others.

We found the pack to feel a bit heavy from water retention on long rainy runs in the Pacific Northwest, but it wasn’t a dealbreaker, even though the fabric did chafe somewhat when wet.

That said, we discovered that the 3D airmesh bodywrap construction provided adequate ventilation even during intense runs. While this vest may not be cool enough for runners in extremely hot and humid climates, it will provide excellent value for most runners.

Should You Buy the Osprey Dyna 6 Hydration Vest?

This vest is an excellent choice for those seeking a versatile, durable garment that can seamlessly transition from rugged mountain adventures to the demands of your weekly long training run.

For runners living or competing in hot and humid climates, it’s important to note that the thicker fabrics may feel a bit warm and less breathable than other options available. 

Despite this caveat, this pack excels—whether you’re training for an ultra or going on a short trail run. It combines exceptional organization with ease of access using fully recycled fabrics. It’s available in gender-specific options and various sizes to ensure a perfect fit.

What Other Hydration Packs Should You Consider?

If the Osprey Dyna/Duro 6 Hydration Vest isn’t the right fit for you, check out the following mid-volume packs and our Best Running Vests gear guide.

Black Diamond Women’s Distance 4 Review: This 4-liter Editor’s Pick boasts easy-to-use buckle closures, flask hydration, and dials in comfort, breathability, and organization in a minimalist style.

Salomon ADV Skin 5 Review: If you’re looking for a mid-volume running vest with a secure fit and long-lasting durability, this 5 liter Budget Buy may be the pack for you. 

Ultraspire Alpha 5.0 Race Vest Review: Flask compatible and fully featured, this 6 liter Budget Buy vest is one of the most comfortable and highly breathable vests we tested.