INVERTED U-FRAME: 7075 ALUMINIUM
At the core of the pack is a 7075 aluminium inverted U-frame. Unlike the traditional dual stays found in most ultralight packs, this continuous U-shape links both sides of the pack, providing both vertical and horizontal stability.
This stability is further enhanced by the use of 7075 aluminium, a high-performance, “aircraft-grade” alloy known for its exceptional strength-to-weight ratio. The result is a frame that’s not only lighter than many others on the market, but also stiffer and stronger.
The bottom line: a lighter pack that carries loads better.
Max carrying capacity: 45 lbs / 20 kg
CHALLENGE SAILCLOTH ULTRA 200X
Widely considered as one of the most durable ultralight pack fabrics on the market, Challenge Sailcloth Ultra 200x® is built to survive aggressive bush bashing and granite scrapes.
Engineered for the most demanding thru-hikes and adventures, this textile blends a woven face of 66% UHMWPE (the world’s strongest fibre) with a high-tenacity polyester to deliver an impressive strength-to-weight ratio.
FEATURE RICH
Outside of the pack’s core carrying and durability components, we wanted to create something that left nothing to be desired when it came to features.
After hiking a collective thousands of kilometers, we knew exactly what we, and other adventurers, look for in a pack.
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ALL-DAY ACCESSIBILITY
We designed pockets and storage solutions that give users all-day accessibility to their gear, snacks, and hydration, without ever needing to open the main compartment.
This includes an oversized front pocket, hybridized with solid fabric and mesh to deliver the best of both worlds: added durability and protection, while still allowing you to see your gear from the outside. Side bottle pockets can fit two Smartwater bottles, sewn-in shoulder pockets easily hold 500 ml soft flasks, and large hip-belt pockets accommodate even the biggest smartphones on the market. A bottom pocket rounds it out, providing quick, on-the-go access to snacks and essentials throughout the day.
EXTERNAL FOAM CHANNELS
We’ve evolved the traditional foam panels found in most packs into two vertical external foam channels. The more comfortable spacer mesh and foam now sit directly against the user’s back, rather than the waterproof Ultra200X fabric (which isn’t ideal against the skin).
The result is improved ventilation, a cooler and less sweaty carry, and a more comfortable overall experience. All while saving weight by using less foam.
COMFORT
Comfort and load-carrying capability are further enhanced with wide, S-shaped shoulder straps, adjustable load lifters, a supportive lumbar pad, and a conical hip belt with a four-way adjustment system. This allows users to fine-tune the fit of the hip belt to match their individual hip shape and curve.
Specifications
| Weight | 825g (M) / 845g (L) |
| Material | Main Body (Ultra 200x) / Side Bottle Pockets, Hip Belt Pockets, Shoulder Straps (210d Ripstop PU Nylon) / Front Pocket Mesh (Polyester Knit Mesh) |
| Torso Length | Medium: 42 - 50cm / Large: 45 - 53cm |
| Hipbelt Circumference (Min - Max) | Medium: 76- 118cm / Large: 82 -125cm |
| Internal Volume | Medium: 55L / Large: 59L |
FAQ
What size to get?
Take a look at our friends at Garage Grown Gear for guidance on choosing the right pack size. We’ve also found that there’s a lot of variation from person to person, some prefer to wear their pack higher, others lower. So a range of factors can influence what size works best for you.
If you’re between torso sizes, we recommend sizing up for greater adjustability and flexibility in volume.
How much can this pack carry?
While it’s somewhat subjective, the pack’s maximum carrying capacity is around 20 kg.
However, for a truly comfortable experience, we recommend keeping your total load to about 15 kg or less.
Can I use a hydration bladder with this pack?
Yes, the pack includes a hydration port, along with an internal hook to securely hold a hydration bladder.
Is this pack waterproof?
While the Ultra 200X fabric itself is waterproof, the seams are not seam-taped. This is due to the type of binding used, which creates a stronger, more durable seam but is too bulky to tape cleanly. As a result, in heavy rain, some water may make its way into the pack.
We recommend using a waterproof pack liner or dry bags to protect critical gear such as your sleeping quilt, bag, and clothing.
How much can I fit on top of the pack?
We’ve designed the length of the top Y-strap webbing to easily secure a 2–3 person ultralight tent, even after rolling the main roll-top down only three times.
Or… one party-sized bag of Doritos, our personal preference.
