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The Gregory Citro 24 H2O (and women's-specific Juno 24 H2O) represents one of the most complete, user-friendly hydration daypacks on the market. CleverHiker recognized it as their top overall hydration pick, largely driven by Gregory's superior 3D Hydro reservoir design. Unlike flat bladders that are difficult to clean and slow to dry, Gregory's reservoir is molded with a co-molded internal spine and an integrated hanger, allowing it to dry out quickly like a water bottle. On the trail, the Citro and Juno deliver high comfort through Gregory's VaporSpan ventilated suspension. An open-air mesh backpanel promotes airflow across your back, while a perimeter alloy frame transfers cargo weight directly into a supportive hipbelt. Reviewers frequently praise the overall balance of this chassis, noting that it carries full 3-liter water loads and a day's worth of gear without sagging or pulling backward at the shoulders. At roughly two pounds empty, it is not an ultralight pack, but the durable materials and thoughtful organization justify the weight. The pack includes large stretch-mesh side pockets that hold extra standard bottles, an external quick-access pocket, and a dedicated zippered hydration sleeve with a SpeedClip mounting system that secures the reservoir without fiddly hooks. **Highlights** - Included 3D Hydro reservoir dries quickly and features an integrated handle - VaporSpan suspended mesh backpanel keeps air moving freely - SpeedClip reservoir mounting system allows one-handed installation - Gender-specific sizing (Citro for men, Juno for women) optimizes fit - Deep stretch-mesh side pockets hold additional large water bottles **Watch-outs** - Slightly heavy for minimalist fast-packers - Main storage cavity fills quickly when the 3-liter reservoir is fully topped off
Pros
- Proprietary 3D Hydro reservoir dries quickly and cleans easier than flat bladders
- VaporSpan suspended mesh frame provides excellent airflow and balanced load support
- SpeedClip reservoir mounting offers swift, secure one-handed bladder installation
- Gender-tailored chassis options provide targeted harness and hipbelt ergonomics
Cons
- Non-adjustable torso length requires careful sizing before purchase
- Full 3-liter reservoir noticeably cuts into main compartment packing space
- At roughly two pounds empty, it is heavy for ultra-minimalist or fast-paced outings
Best uses
- All-day summer hiking
- Desert and canyon trails
- Organized day excursions
- Gear-heavy day treks
Specifications
- Pack Capacity
- 24 liters
- Reservoir Volume
- 3.0 liters (included 3D Hydro)
- Stated Weight
- 2 lb 0.3 oz (Citro) / 1 lb 14.9 oz (Juno)
- Suspension Type
- VaporSpan tensioned mesh with alloy perimeter frame
- Torso Fit
- Gender-specific fixed sizing (Citro / Juno)
- MSRP
- Approximately $180
Pricing
We don't publish a price we haven't verified. The retailer links below open the live listing for this exact model.
Full catalog listing & offersBest for
All-day summer hiking, Desert and canyon trails, Organized day excursions, Gear-heavy day treks
Where to buy the Citro 24 H2O / Juno 24 H2O
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The Gregory Citro 24 H2O and women's-specific Juno 24 H2O stand out in the crowded daypack market by solving one of the most frustrating aspects of hydration gear: bladder maintenance and load management. Building around Gregory's proprietary 3D Hydro reservoir, this 24-liter pack pairs a robust 3-liter water capacity with a fully structured hiking chassis, bridging the gap between casual hydration carriers and technical daypacks. Instead of treating water containment as an afterthought slotted into an unsupportive rucksack, Gregory built the Citro and Juno around their VaporSpan ventilated frame. The system uses a perimeter alloy wire frame to distribute weight across padded hip fins while maintaining tensioned mesh separation against the user's back. The result is a pack tailored for full-day excursions where carrying three liters of water plus weather layers demands legitimate structural support. At roughly two pounds unloaded, this model clearly prioritizes stability, pocket architecture, and reservoir utility over pure minimalist weight savings. For day hikers seeking a turnkey setup that handles varied terrain without requiring separate bladder purchases, it provides a well-calibrated, durable option.
Who It Suits Best
The Citro 24 H2O and Juno 24 H2O target day hikers who prioritize back ventilation and carrying comfort over ultralight minimalism. With 24 liters of total internal volume and a pre-packaged three-liter bladder, it suits multi-hour or full-day itineraries where water access is limited and trail conditions require carrying supplemental layers, food, and basic safety essentials. It is an ideal platform for hikers frustrated by generic daypacks that collapse against the lumbar spine under heavy liquid weight. However, runners, mountain bikers, or fastpackers who prefer low-profile, vest-style harnesses will likely find the rigid internal frame and padded hipbelt excessively bulky for high-cadence or high-aerobic activity.
Reservoir Design and Usability
The standout element of this pack is the included Gregory 3D Hydro reservoir. Unlike flat polyurethane bladders that stick together internally and remain damp for days, the 3D Hydro features a molded, semi-rigid shape with an integrated drying spine. This structure allows air to circulate inside the bladder when hung upside down via its built-in hanger hook, drastically shortening drying times and simplifying cleaning. The reservoir slides into a separate zippered back compartment secured by Gregory's proprietary SpeedClip attachment, which snaps cleanly into place without requiring finicky loops. The hose runs along the shoulder harness and anchors to the sternum strap via a magnetic clip, keeping the bite valve accessible while in motion.
Frame and Suspension Mechanics
Gregory incorporates their VaporSpan suspension into the Citro and Juno chassis, utilizing an alloy perimeter wire to maintain structural tension across a suspended mesh backpanel. This design leaves an intentional air gap between the pack body and the wearer, encouraging passive airflow that significantly reduces back perspiration during warm-weather ascents. Because the perimeter frame connects directly into the lower lumbar pad and padded hipbelt, the physical burden of a topped-off three-liter reservoir transfers into the hips rather than dragging back on the shoulders. The load remains centered without barrel-rolling, though the bowed frame does introduce a slight curve into the internal cargo cavity.
Materials and Long-Term Durability
Constructed with a blend of high-density nylon and tear-resistant fabrics, the Citro and Juno withstand routine scrapes against granite outcrops and brush-lined switchbacks. Gregory reinforced high-friction points, including the pack base and exterior stretch pockets, with abrasion-resistant textiles to prevent early wear. Zipper pulls are oversized for easy handling with gloved fingers, and the seam stitching across load-bearing harness junctions is reinforced. The molded reservoir also proves more resistant to punctures and seam fatigue than standard film-welded bladders, though users must exercise standard care with the bite-valve lock to prevent minor leaks when setting the pack down on coarse ground.
Fit and Adjustability
Fit customization is achieved through distinct male and female chassis geometries rather than an adjustable sliding backpanel. The Citro offers broader shoulder straps and a longer back length suited for typical male silhouettes, whereas the Juno features narrower shoulder strap contours, sculpted hip wings, and a shorter torso range tailored to female biomechanics. Both variants include load-lifter straps at the upper shoulders—a feature often missing on hydration-specific daypacks—which pull the cargo closer to the center of gravity. Hikers with exceptionally short or long torsos should verify their back measurements beforehand, as the fixed frame length cannot be lengthened or shortened.
Market Alternatives and Trade-Offs
At the $180 tier, the Citro and Juno compete against stalwarts like the Osprey Manta 24 and Mira 24, as well as the CamelBak Rim Runner 22. The Osprey models provide torso length adjustability and similarly ventilated frames, but they command a higher price tag and carry slightly more base weight. CamelBak offers simpler, lighter alternatives, though typically lacking the perimeter frame rigidity and drying convenience of Gregory's 3D bladder. The primary concession with the Citro and Juno is space distribution: when the three-liter reservoir is completely filled, its physical bulk encroaches on the primary packing compartment, reducing usable dry storage for bulkier extra gear.
How we picked
We started with a long list of hydration packs that people actually buy, cut anything that could not clear our baseline for durability and field performance, then ranked the 10 that were left against the same criteria. Rankings are editorial. No brand pays for placement, and affiliate links never move a pick up or down.
- Load carriage
- How the suspension handles the loads the pack is actually rated for, over long days.
- Real-world durability
- How the material, stitching, or steel holds up after a season of hard use — not how it looks new.
- Performance in bad conditions
- Wind, rain, cold, and grit are the test. Anything that only works on a nice day gets marked down.
- Weight and packability
- Every ounce has to earn its place in the pack, but not at the cost of something that fails in the field.
- Ease of use
- Setup, adjustment, and maintenance with cold hands, in the dark, without the manual.
- Value at its price point
- Compared against the closest competitors in the same tier, not against cheaper gear in a different class.
Citro 24 H2O / Juno 24 H2O — frequently asked questions
- Is the Citro 24 H2O / Juno 24 H2O worth it?
- We rank it #3 in Hydration Packs. The Gregory Citro 24 H2O (and women's-specific Juno 24 H2O) represents one of the most complete, user-friendly hydration daypacks on the market. CleverHiker recognized it as their top overall hydration pick, largely driven by Gregory's superior 3D Hydro reservoir design.
- What is the Citro 24 H2O / Juno 24 H2O best for?
- Best for all-day summer hiking, desert and canyon trails, organized day excursions and gear-heavy day treks. Standouts: proprietary 3d hydro reservoir dries quickly and cleans easier than flat bladders and vaporspan suspended mesh frame provides excellent airflow and balanced load support.
- What are the downsides of the Citro 24 H2O / Juno 24 H2O?
- Non-adjustable torso length requires careful sizing before purchase, Full 3-liter reservoir noticeably cuts into main compartment packing space and At roughly two pounds empty, it is heavy for ultra-minimalist or fast-paced outings.
- What are the key specs of the Citro 24 H2O / Juno 24 H2O?
- Pack Capacity: 24 liters · Reservoir Volume: 3.0 liters (included 3D Hydro) · Stated Weight: 2 lb 0.3 oz (Citro) / 1 lb 14.9 oz (Juno) · Suspension Type: VaporSpan tensioned mesh with alloy perimeter frame · Torso Fit: Gender-specific fixed sizing (Citro / Juno)
- Who It Suits Best?
- The Citro 24 H2O and Juno 24 H2O target day hikers who prioritize back ventilation and carrying comfort over ultralight minimalism. With 24 liters of total internal volume and a pre-packaged three-liter bladder, it suits multi-hour or full-day itineraries where water access is limited and trail conditions require…
- Reservoir Design and Usability — what should I know about the Citro 24 H2O / Juno 24 H2O?
- The standout element of this pack is the included Gregory 3D Hydro reservoir. Unlike flat polyurethane bladders that stick together internally and remain damp for days, the 3D Hydro features a molded, semi-rigid shape with an integrated drying spine.
Compare side by side
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