CART STATUS: Awaiting Adventure Gear.
1. TORSO FIT
- Standing upright, tilt your chin to your chest.
- Locate your C7 Vertabra—the large lump at the base of your neck.
- With flexible tape, measure down the length and natural curvature of your spine to your iliac crest/ the top of your hipbone.
- This measurement in inches is your torso length.
TIP: If you're between 2 sizes, order the smaller size. Still not sure? Contact us.
2. TORSO CHART
We've found most people in these height ranges fall into these torso/pack sizes. That being said, it is always best to measure your torso using the guide above.
If you're between sizes and you are getting a FRAMED pack, we recommend you size DOWN!
If you're between sizes and you are getting a FRAMELESS pack, we recommend you size UP!
If you have questions, or your torso size doesn’t seem to make sense for your height, please contact us.
3. HIPBELT FIT
Use the following method to determine your hipbelt inches, then head to Step 4 to see the hipbelt size you need.
Pant Waist Size + 2".
CURVY HIPS: Smallest part of your waist + 5".
STRAIGHT HIPS: Smallest part of your waist + 3".
Smallest Part of waist + 2".
4. HIPBELT SIZE CHART
Find the hipbelt measurement you calculated in Step 3 on the chart. That will be your hipbelt size.
TIP: If you are on the outer edge of a size, order the larger size. [ Ex: If you are 38", you will notice 38" is the last number of the Medium Hipbelt and the first number of the Large Hipbelt. You would want to order a Large.]
5. SHOULDER STRAPS
The downward slope of your shoulder profile usually determines strap preference. You can assess your shoulder slope profile by looking in a mirror or having a friend look at the angle of your shoulder from the base of your neck to your shoulder point.
If there is relatively little or no downward slope, you have what is referred to as flat or squared shoulders.
If there is a noticeable downward slope, you have what is referred to as standard or sloping shoulders.
J-straps are the traditional straight straps. They are best suited for people with flat or square shoulders, as their flat shape provides better surface contact and less rub.
S-straps contour body curves. They are best suited for people with standard or sloping shoulders, as their contoured shape better hugs your shoulder slope.
TIP: If you have a short torso but a larger upper body, you may need a slightly longer strap. If you are very large in the upper body, you might need XL shoulder straps. Contact us, and we would be happy to make these customizations so your pack is comfortable and fits well.
MADE IN THE U.S.A.
FREE U.S. DELIVERY
TUNE-UPS & REPAIRS*
Say hello to the Ultra Ohm; the same Ohm you know and love, only stronger and lighter than ever. Purposefully constructed of Ultra 400 in high abrasion areas and Ultra 200 in low abrasion areas, we’ve selected a fabric matrix that maximizes durability while keeping the pack ultralight [31.3 oz!]
In our commitment to making quality, durable backpacks that last a lifetime, we’ve been hesitant to build packs out of many popular ultralight fabrics. Why Ultra? 15x stronger than steel by weight, twice as abrasion resistant as standard 420D nylon, and waterproof to 200 psi, we’ve finally found an ultralight fabric that matches our high standards. Front pocket is ULTRA StretchMesh for added abrasion resistance. Note that to maximize water resistance of the ULTRA Ohm, these packs do not have bladder hose ports.
The Ultra Ohm was built for the fast hikers who travel light but still take a prudent amount of gear to be safe and comfortable. Combining a 1.2 oz Carbon Fiber/Delrin active suspension hoop and near full-body compression, the Ohm maximizes load control, weight transfer, compression, and overall pack rigidity in an ultralight package. This pack uses the same belt and shoulder strap system as our larger packs, so comfort and weight transfer are optimal. Like our larger packs, the hipbelt can move up or down in its sleeve, allowing you to fine-tune the torso length. This pack comes standard with a roll-top closure.
The Ultra Ohm is a full-featured, active full-suspension, ultralight pack that offers exceptional load control, on-trail functionality, and full-body compression.
MATERIAL: Challenge ULTRA™
COLOR(S): Graphite Black/Silverado Grey
AT A GLANCE
WEIGHT: 31.3 OZ | 887.3 GM
VOLUME: 3,960 CU IN | 63 L
MAX LOAD: 30 LBS | 13.6 KG
Purposefully constructed of Ultra 400 in high abrasion areas and Ultra 200 in low abrasion areas, we’ve selected a fabric matrix that maximizes durability while keeping the pack ultralight.
- ULTRA 400 + ULTRA 200 Fabric
- ULTRA Hipbelt Pockets w/ YKK Waterproof Zippers
- ULTRA Side Pockets w/ Elasticized Top
- UltraStretch™ Mesh Front Pocket
- Suspension Hoop
- Internal Pad Holster
- Contoured Padded Hipbelt
- Contoured Shoulder Straps
- Non-Stretch Compression Cordage
- Top Compression Straps
- Trekking Pole Loops
- Roll-top Extension Collar
- Foam Pad (2.0 oz)
- ULA Logo on Front Stretch Mesh
- NO Water Hose Port for Max Water Resistance
- Removable & Height Adjustable Pass-through Hipbelt
REC. MAX LOAD: SUB 30 LBS
TOTAL VOLUME: 3,960 CI | 63 L
- Main Body: 2,100 CI | 34.4 L
- Front Mesh Pocket: 500 CI | 8.2 L
- Left Side Pocket: 400 CI | 6.6 L
- Right Side Pocket: 400 CI | 6.6 L
- Extension Collar: 500 CI | 8.2 L
- Left Hipbelt Pocket: 100 CI | 1.6 L
- Right Hipbelt Pocket: 100 CI |1.6 L
Q: WHY ULTRA™?
A: ULTRA is 15x stronger than steel by weight, twice as abrasion resistant as standard 420D nylon, and waterproof to 200 psi. Ultra is the ultimate in ultralight fabric, with the strength to go the distance in the harshest environments.
ULTRA fabric lasts longer, absorbs 80% less moisture, and has better UV resistance and color retention than traditional laminated nylon.
ULTRA is the only durable, waterproof pack fabric made from 100% recycled polyester! Every yard contains over 20 plastic bottles and saves over one pound of carbon emissions compared to standard pack fabric.
Q: WHAT IS UltraStretch™ MESH?
A: UltraStretch™ Mesh is built for maximum abrasion and cut resistance. A technical fabric, UltraStretch™ Mesh is a 4-way stretch mesh woven with the highest quality fibers for performance and longevity.
Q: WHAT IS A SUSPENSION HOOP?
A: The suspension hoop used in the Ohm is a minimal solution in helping you transfer load between shoulder and hip. If you imagine an upside ‘U’ you get a sense of how the hoop is positioned and how it functions. The upper arch of the ‘U’ ties into the shoulder straps, while each leg of the ‘U’ ties into the hipbelt. These points of contact allow for a range of suspension flexibility while being rigid enough to support loads up to 30 lbs. In addition, because the suspension is located to the periphery of the pack body, the backpanel is ‘soft.’ This results in a pack that can handle a load and does not dictate your body’s movements — but rather responds to how you move.
Q: WHAT EXACTLY IS THE VARIABLE COMPRESSION SYSTEM (VCS)?
A: The bane of many ultralight packs is the lack of adequate compression. They work great when they are fully loaded (and therefore relatively stable in terms of load control), but suffer when the total volume is not packed. The Variable Compression System on the Ohm allows the entire pack body to be compressed no matter the overall volume of gear you have. We use non-stretch cordage as it maximizes compression and is lighter, and our 2mm nickel grommets act as cordage guides to ensure a smooth pull and stability.
Q: HOW DO I USE MY SLEEPING PAD IN CONJUNCTION WITH THE OHM? WHAT PADS WORK BEST?
A: Just about any lightweight pad (foam or inflatable) can be used for additional support and padding inside the Ohm. Three quarters and full length pads that can be folded (as opposed to rolled) work the best. If you are using an inflatable mattress, deflate, then fold it into 1/3’s or 1/5’s before inserting. We also supply a ¼ inch piece of open cell foam with the pack that works very well for those of you not carrying a sleeping pad.
Q: DOES A BEAR CANISTER FIT IN THE OHM?
A: Yes. Smaller bear cans can fit in the pack vertically, while larger cans can be strapped to the top of the pack (externally.)
To see a chart showing what bear cans fit in what ULA packs (and how), visit our blog post “Bears! Everything You Need to Know About Backpacking in Bear Country.“
Q: CAN A WATER BOTTLE FIT IN THE SIDE POCKETS?
A: Personally, we prefer to carry a smaller 20 oz bottle in the Ohm. The shorter height is more secure in the ~6″ tall pocket, and is easier to reach than a taller 32 oz bottle. In general most people can reach back and retrieve a bottle, drink, and return the bottle to the pocket without removing the pack. The top of the side pockets are angled for easier access, and are keep under tension with non-adjustable 1/2″ elastic.
Q: HOW DOES THE TOP OF THE PACK STAY CLOSED?
A: The top of the pack closes like a dry bag (also known as a rolltop) very similar to what river runners use to create a water resistant seal for their gear bags. The back of the collar is slightly taller than the front. Once you are packed, the collar can be rolled down upon itself to effectively create a barrier to water penetration. Once rolled, each side of the collar can be buckled to the sides of the pack or the two yellow buckles on the top can also be fastened to each other.
As for access, once the collar is rolled and fastened shut, you would need to unbuckle the compression straps and unroll the collar to access the inside of the pack. However, the roll-top only needs to be rolled shut when the weather dictates. If the sky is dry, the collar can simply be folded forward. Vertical compression can still be achieved by buckling the collar to the sides of the pack.
ULTRA™ represents a new paradigm in durability and weight. Constructed with an optimal blend of UHMWPE (Ultra-high-molecular-weight polyethylene) & high-tenacity polyester, the tight weave is laminated with an eco-friendly adhesive to Challenge RUV™ film. The result is an incredibly strong, lightweight, and waterproof to 200 psi textile.
ULTRA™ is the ultimate in ultralight pack fabric, with the strength to go the distance in the most demanding environments.
200D Ultra PE is woven and laminated to recycled, waterproof RUV™ film. At just 3.5oz/yd2, it exceeds the technical properties of any similar weight fabric available on Earth. Tear Strength: Warp: 103.1 lb / Fill 133.2 lb. Abrasion Resistance: 4,400 cycles.
A high modulus pack fabric, ULTRA 400, is constructed of a 400d Ultra PE (similar to Dyneema®) with 0.5 mil RUV™ film backing. It is 20% lighter and four times as abrasion-resistant than other 400d U-PE fabrics. Weight: 4.65 oz/yd², 158 gsm. Tear Strength: Warp: 187.7 lb, Fill 161.1 lb. Abrasion Resistance: 8,800 cycles.