ULA Catalyst 75L (Black)

365,00 €

Weight: 1259 g

Torso length

Clear

The Catalyst 75L is ULA’s largest ultralight backpack, offering a massive 75 liters of storage for extended adventures. Despite its size, it weighs just 1259, grams and carries heavy loads with ease, both inside the pack and securely attached to the outside. It is an excellent choice for long trips that require extra food and water, as well as camera, photography, or other specialist equipment. The Catalyst also handles fishing gear or climbing equipment alongside standard backpacking essentials without compromise.

The ULA Catalyst 75L is a true classic among large, lightweight backpacks. First introduced nearly twenty years ago, it was one of the earliest large-capacity packs to prove that low weight and serious load carrying could coexist. Over the years, the design has been continuously refined. The latest version features an updated front pocket made from durable UltraStretch mesh, along with additional external attachment points for even greater versatility.

Built for durability and real-world use, the Catalyst suits both demanding long-distance hikers and wilderness professionals who need a reliable, high-volume pack for carrying extra gear. It is also a strong option for anyone looking to step into their first lightweight backpack without sacrificing comfort or capacity. Tough construction meets ultralight materials, resulting in impressive load support without unnecessary weight. With its flexible storage layout and multiple attachment options, the Catalyst is an ideal pack for trips where every piece of gear and every kilogram truly matters.

Important: Please remember to add the correctly sized hip belt to your cart here.

Description
Additional information

ULA Catalyst 75L

Note: Black color

The ULA Catalyst is a durable, versatile backpack built for demanding trips and constantly changing conditions. The updated UltraStretch front pocket offers improved abrasion resistance, while combined ice axe and trekking pole attachments now come standard. New external attachment points for removable straps make it easy to secure extra gear such as a tent, bear canister, or sleeping pad whenever needed.

With a total capacity of 75 liters and a comfortable load rating up to 18 kg, the Catalyst easily handles long expeditions and gear-heavy pursuits like fishing, climbing, or photography. Despite its carrying capability, the pack weighs just 1.26 kg. An internal frame, ergonomically shaped shoulder straps, and a well-padded hipbelt ensure comfort on long days on the trail.

Organization is straightforward and practical. The large front pocket, adjustable side pockets, and dual hipbelt pockets keep essentials within easy reach. A roll-top closure, side compression straps, and a removable, height-adjustable hipbelt allow the pack to adapt to different trips and packing styles. The Catalyst is also easy to check for air travel, making it a solid option for international adventures. Proven on long-distance routes like the Pacific Crest Trail and the Appalachian Trail, the Catalyst delivers a lightweight yet reliable alternative to traditional heavy trekking packs.

Volume breakdown
Main compartment: 42.6 L
Extension collar: 9.8 L
Front pocket: 9.8 L
Side pockets: 5.7 L each
Hipbelt pockets: 1.5 L each

Key features

UltraStretch front pocket
Ice axe and trekking pole attachments
External attachment loops with removable straps
Color-accented bottom panel and shoulder straps
Internal frame
Roll-top closure with side compression straps
Dual hipbelt pockets, adjustable and removable hipbelt
Sternum strap and hydration port

Torso length measurement

Stand upright and tilt your chin slightly toward your chest.
Locate the C7 vertebra at the base of your neck.
Measure along the natural curve of your spine from the C7 vertebra down to the top of your hip bone.
This measurement is your torso length.

Tip: If you fall between two sizes, choose the smaller size.

Pack size chart
Small: 38–46 cm torso, under 168 cm user height
Medium: 46–53 cm torso, 168–183 cm user height
Large: 53–61 cm torso, 178–193 cm user height
X-Large: over 61 cm torso, over 193 cm user height
Kids model: 30–46 cm torso, for children

Hipbelt sizing
Men: pants waist size + 5 cm
Women: Curvier hips: narrowest waist measurement + 13 cm
Straighter body shape: narrowest waist measurement + 8 cm

Hipbelt size chart
XXS: 46–66 cm
XS: 66–76 cm
S: 76–86 cm
M: 86–97 cm
L: 97–107 cm
XL: 107–119 cm
XXL: 119 cm and up

Tip: If your measurement falls at the upper limit of a size, choose the next larger size.