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 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
J-straps are the traditional straight straps. Best for: Lean or straight builds, kids, curved and narrow shoulders.
S-straps contour body curves. Best for: Women, athletic and bigger builds, square and wide shoulders.
TIP: If you have a short torso but a larger upper body, contact us for a slightly longer strap. If you are very large in the upper body you might need XL shoulder straps, again contact us.
BUILT FOR HOW YOU ADVENTURE.
FULLY CUSTOMIZE THE FABRIC, COLORS & FEATURES ON YOUR CATALYST.
MADE IN THE U.S.A.
FREE U.S. DELIVERY
TUNE-UPS & REPAIRS*
The ULA Catalyst remains the tried and true workhorse of the ULA pack line. No matter where the adventure takes you, the Catalyst will be there – ready to carry loads of up to 40 pounds. If you’re looking for a pack that will haul a bear canister horizontally or carry your fishing, climbing, or photo gear with ease, the Catalyst is an excellent choice. Not only will it hold a good-sized load, but it can also be checked as baggage on a plane! The ULA Catalyst has consistently been among the top 5 most popular packs on the Pacific Crest Trails and the Appalachian Trail.
Internal frame with a twin stay framesheet, comfy padded hipbelt, and contoured shoulder straps make for all-day comfort even when you’re loaded down. Front mesh pocket, dual hipbelt pockets, and Robic adjustable side pockets make it easy to stay organized whether you’re on a thru or just out for the weekend. Weighing only 44.4 oz, this pack will lighten you up but still handle the toughest duties.
Bottom Line? The Catalyst is a tough and light pack built for traditional backpackers.
AT A GLANCE
CATALYST [WEIGHT BY SIZE | OZ]
VOLUME: 4,600 CU IN | 75 L
MAX LOAD: 40 LBS | 18 KG
The Catalyst remains the tried and true workhorse of the ULA pack line. No matter where the adventure takes you, the Catalyst will be there – ready to carry loads of up to 40 pounds.
- Internal Frame
- Twin Stay Framesheet
- Contoured Shoulder Straps
- Front Shock Cord
- Front Mesh Pocket
- Dual Hipbelt Pockets
- Rolltop Closure
- Side/Top Compression Straps
- Ice Axe/Trekking Pole Retention Loops
- Sternum Strap
- 400 Robic Bottom Panel
- 400 Robic Adjustable Side Pockets
REC. MAX LOAD: SUB 40 LBS
REC. BASE WEIGHT: SUB 20 LBS
TOTAL VOLUME: 4,600 CU IN | 75 L
BREAKDOWN (CU IN):
- Main Body: 2,600
- Front Mesh Pocket: 600
- Left Side Mesh Pocket: 350
- Right Side Mesh Pocket: 350
- Extension Collar: 600
- Left Hipbelt Pocket: 100
- Right Hipbelt Pocket: 100
Q: WHAT IS THE ‘TWIN STAY’ FRAMESHEET?
A: The standard framesheet is comprised of a very dense piece of foam and two ½ aluminum stays which are positioned in a ‘V’ shape. The stays can be bent to give the framesheet a specific contour to your spinal curve. The standard, twin stay framesheet is ideal for loads between 32-40 lbs. It offers plenty of stability and load control within that load range and is well suited for on or off trail hiking.
Q: CAN A BEAR CANISTER FIT IN THE CATALYST?
A: Yes. Every bear canister on the market other than the Bearikade Expedition will fit into the Catalyst horizontally. Keep in mind it is best to pack something between the hard sided canister and the bottom of the pack.
Q: WHERE DO I STRAP MY SLEEPING PAD?
A: If you are using an inflatable pad, we recommended storing it in the interior of the pack to avoid punctures. A foam pad can easily be secured beneath the top compression strap that goes over the top of the pack or beneath the front shock cord compression. Although not necessary for optimum performance, positioning your sleeping pad into the interior of the Catalyst (against the back-panel) is also a good solution.
Alternately, you can build your own pack and add Bottom Straps, or a top Y-strap to carry your pad externally.
Q: CAN A WATER BOTTLE FIT IN THE SIDE POCKETS?
A: Each side pocket can accommodate two 1-Liter ‘Big Slam’ style bottles. A Nalgene-style bottle will also fit, but in your quest to lighten up, that should have been replaced a long time ago! 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 adjust singlehandedly with a cord lock and internal bungee to open and close.
Q: HOW DOES THE TOP OF THE PACK STAY CLOSED?
A: The top of the Catalyst 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.
ULA 400 ROBIC
…the toughest stuff ounce for ounce we’ve ever seen. Highly tear and abbrassion resistant, reinforced with a ripstop weave to increase tear strength and stitch holding capabilities. 100% Robic Nylon fabric with three-pass Teflon DWR and a three-pass PU Coating, making it highly water resistant.
…one of the most popular high-performance technical fabrics in the industry. Low stretch, abrasion resistant, and a high denier face fabric strike a near-perfect balance between weight and durability. These multi-layered laminated fabrics are waterproof to 200+ PSI.