Stone Glacier, KUIU, EXO: Brand Comparison
I’d check the fit under load first, then compare weight and storage capacity. The Stone Glacier Solo 3600 is known for its low weight, while the KUIU ICON Pro 6000 offers plenty of space. The EXO K4 5000 offers more options for getting the fit right, with several frame heights.
I’m comparing published specifications, not my own hands-on experience. Some KUIU details remain unclear; the EXO specifications in the available material aren’t entirely consistent either.
Quick comparison
| Criteria | Stone Glacier Solo 3600 | KUIU ICON Pro 6000 | EXO K4 5000 |
|---|---|---|---|
| Storage capacity | 59 l plus a separate load shelf | About 98 l, according to an earlier manufacturer specification | About 82 l without the lid |
| System weight | About 1.9–2.0 kg | Not reliably verified | About 2.4–2.6 kg, depending on configuration |
| Access | U-shaped front zipper | Large back zipper | Not verified here |
| Frame and fit | Krux or the more contoured Xcurve | Check the generation and dimensions | Four frame heights |
| Game hauling | Load shelf between the bag and frame | Check the specific model | Load capacity of about 68+ kg listed |
<u>My buying criteria: the exact configuration on offer.</u> Check the frame, hip belt, accessories, and condition. If you’re buying in Germany, also consider availability, returns, and the final price in euros, including shipping and any potential import costs.
(WATCH BEFORE BUYING A NEW PACK) 2023 Top Hunting Pack Comparison: 50 and 100 Pounds!
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Stone Glacier Solo 3600: Weight, Access, and Frame
Stone Glacier Krux vs. Xcurve: Frame and Weight
With the Solo 3600, Stone Glacier focuses on low weight, quick access, and two frame options. Load transfer takes priority over elaborate internal organization.[1][4][7]
Solo 3600: Capacity, Access, and Pack Bag Weight
The U-shaped front zipper opens the main compartment wide. An exterior pocket and a compartment for a spotting scope or water bottle round out the simple layout.[1][3]
The pack bag alone weighs around 624 g. Stone Glacier recommends ultralight four-season gear and food for about a week as a guideline.[1] So, in addition to capacity, consider the actual weight of the entire system in your chosen configuration.
| Criterion | Advantage | Limitation |
|---|---|---|
| Total weight | Krux: 1.88–1.93 kg; Xcurve: 1.99–2.00 kg.[1][6] | Figures are for size M hip belts. |
| Fit | Two different frame profiles.[4][7] | Choose based on your back shape. |
| Access | Large opening for gear stored deeper inside.[3] | Few separate compartments.[5] |
| Organization | Can be expanded with separate pouches.[5] | Simple design out of the box. |
| Game transport | The integrated Load Shelf provides around 41 l of extra storage space between the frame and pack bag.[1][2] | No enclosed, weather-protected interior. |
On long hunts in particular, the Load Shelf helps keep game meat and gear separate.[1][2] Test your complete packing list in advance—including water, food, and safety gear.[2][5]
Krux and Xcurve: Fit, load transfer, and construction
Frame weight specifications vary depending on the source and configuration.[4][7]
| Feature | Krux | Xcurve |
|---|---|---|
| Frame weight | Approx. 1.11 kg including size M hip belt.[7] | Approx. 1.36–1.39 kg including size M hip belt.[4][7] |
| Shape and sizing | Flatter profile; check Krux Short separately.[7] | More contoured; documented height of around 66 cm.[4] |
| Construction | Carbon composite components.[7] | Four carbon composite stays in an X configuration.[4] |
| Load rating | Over 150 lb, equivalent to around 68 kg or more.[1][6] | Also over 150 lb, equivalent to around 68 kg or more.[1][4] |
Frame shape matters more than a few grams when it comes to comfort: Krux is flatter, while Xcurve is more contoured. Measure your hip circumference according to the manufacturer's instructions instead of relying on your pants size. Then check the fit with a realistic hunting load.[4][5][7]
The carbon composite stays are part of the frame. Cordura 500 and X-Pac, on the other hand, refer to the pack bag.[2][4][7]
KUIU ICON Pro 6000: Capacity, access, and weight
When comparing the ICON Pro 6000 with Stone Glacier and EXO, the main factors are capacity, access, weight, and frame fit. However, uncertain specifications make a direct comparison difficult. If you're considering a used model, check the model code, year of manufacture, and included items carefully.[8][9][10]
| Criteria | Advantage | Limitation or point to check |
|---|---|---|
| Capacity | KUIU lists 6,000 cu in, or around 98 l, with the snow collar extended.[14] | Usable interior capacity may vary by generation. |
| Access | The YKK rear zipper with four sliders opens the main compartment wide.[14] | Check the zipper layout on the specific pack. |
| Suspension system | Modular carbon frame with interchangeable bags.[13] | The frame height and suspension must match the model and your torso length. |
| Total weight | A 2023 load test found the KUIU Pro 6000 weighed around 2.78 kg.[15] | Consider the configuration and production version when comparing. |
ICON Pro 6000: Storage and system weights
KUIU's early specification lists a target weight of under 2.27 kg.[14] Don't confuse them: The often-quoted 2.79 kg, 98 l total volume, 87 l without the lid, 11.5 l lid volume, and 82 l external load capacity refer to the ICON 6 6000—not the ICON Pro 6000.[10][12] When buying used, weigh the frame, suspension, hip belt, and accessories separately.
ICON Pro 6000: Zippers, frame sizes, and materials
For the 3000/6000 pack family at the time, KUIU lists 160D Cordura Ripstop.[14] Fold the lid back to reveal a full-length zipper on the back panel, giving you wide access to the main compartment.[14]
Reliable frame measurements for the Pro 6000 are unavailable. KUIU recommends choosing the fit based on torso length rather than height and adjusting the suspension with a load of about 9–14 kg.[11] Also check the carbon frame, seams, buckles, and zipper pulls on a used system. With the EXO K4, frame height and load transfer take center stage again.
EXO K4: Fit and load hauling
The EXO K4 5000 offers about 82 l (5,000 cu in) in the main compartment. The lid and side pockets add 800 cu in, or about 13 l. The available information doesn't give an exact total volume.
Reliable details on frame height, hip belts, load transfer, access, and materials aren't available here. So the brand comparison mainly comes down to storage capacity. Check the fit under a realistic hunting load before you decide.
Conclusion: Choose based on your hunting style and fit
No brand is right for every use. What matters is your hunting style, pack, frame, and hip belt—and how the system actually fits. Weight and access can help you narrow down the right setup.
| Your use | Configuration to consider |
|---|---|
| Multi-day mountain hunt with limited resupply | KUIU ICON Pro 6000: plenty of storage and quick access if you need a larger setup with more organization options. |
| Still hunting and hauling game | Stone Glacier Solo 3600: if low weight and the load shelf matter more to you than lots of interior pockets.[1] |
| Different body measurements | EXO K4: when frame height and hip belt are key to getting the right fit for you.[16] |
| Every purchase decision | Compare only the combination of pack, frame, and hip belt actually being offered. |
Once you’ve settled on a brand, check the specific listing: size, components, and what’s included.
Buying checklist for hunters in Germany
Published size specifications are no substitute for a fit check. For KUIU, also check access and what’s included with the specific item.
| What to check | Confirm before ordering |
|---|---|
| Model and what’s included | Which generation, pack, frame, hip belt, lid, and accessories are included? Also check which parts are included in the stated empty weight. |
| Sizes | Compare the back length range, frame height, hip belt size, and adjustment range using the manufacturer’s measurement method. |
| Availability | Ask for confirmation of stock and delivery time for the specific configuration. For listings on Gunfinder, check the model, generation, components, and condition. |
| Condition when buying used | Check the carbon stays, hip belt padding, seams, buckles, and load shelf attachments. |
| Total price in euros | Factor in VAT, shipping, and, if applicable, import VAT, customs duties, and fees. A US list price is not the final price in Germany. |
| Returns and warranty | Check the deadlines, return shipping costs, and warranty terms. |
Measure your back length and hip circumference according to the manufacturer’s instructions. Then test the system with a realistic load: fit and load transfer matter more than volume and weight.
FAQs
How can I tell if a pack transfers weight well?
A good load transfer shifts the weight from your shoulders to your hips. The hip belt needs to be stable and well padded, and sit firmly on your hip bones. The frame keeps the pack close to your center of gravity and supports it. Use the load lifter straps to fine-tune the weight distribution.
Test the fit with weight: The suspension system shouldn’t cause pressure points and should stay stable when you move.
How much pack volume do I need for a mountain hunt?
The right pack volume depends mainly on how long your mountain hunt lasts. For day trips in steep terrain, 20 to 35 liters is usually enough. For challenging terrain or larger trophies, plan for at least 50 liters.
For multi-day trips, 45 to 80 liters is ideal. This gives you room to safely store your gear, food, and harvested game. For longer trips, also look for a high-quality framed suspension system that distributes the load steadily across your hips and back.
How can I spot damage to the carbon frame?
Check the carbon frame regularly for wear and structural damage. Pay particular attention to cracks, chips, and unusual deformation in the stays.
Carbon can fail under stress. Have visible damage to load-bearing components repaired early or replace the affected parts so your backpack remains reliable and safe in the field.
