ULA Circuit 68L
ULA Circuit is a modern classic of lightweight backpacking—now more versatile, more durable, and more refined than ever. Designed for hikers whose gear lists and objectives change from trip to trip, the Circuit is built to carry everything you need efficiently, without sacrificing comfort or usable volume.
In the latest version, the traditional mesh front pocket has been replaced with highly abrasion-resistant UltraStretch™ fabric. Ice axe and trekking pole loops now come standard, and low-profile attachment points have been added to the top and bottom of the pack for removable accessory straps. These allow you to secure extra gear such as a tent or sleeping pad when needed, without cluttering the pack when you don’t.
Weighing just over one kilogram, the Circuit carries loads of up to 16 kg with impressive stability and comfort. It is an excellent choice for hikers whose total pack weight stays under roughly 14–16 kg and who want to move freely over long distances. The Circuit has been the most popular backpack on the Pacific Crest Trail for multiple years and has earned both The Trek Best Gear 2023 and Treeline Review Best Gear 2024 awards.
The suspension system combines an internal carbon fiber and Delrin frame, dense foam structure, and a single aluminum stay. This setup provides solid back support, effective weight transfer to the hips, and enough stiffness for heavier loads while still allowing natural movement on the trail.
Features
• UltraStretch™ front pocket
• Ice axe and trekking pole loops
• Low-profile attachment points for removable accessory straps
• Internal frame and padded back panel
• Shaped J-style shoulder straps and height-adjustable, removable hipbelt
• Two zippered hipbelt pockets
• Roll-top closure with top strap
• Side compression straps
• Front shock cord
• Hydration hose port
Materials
ULA 400 Robic nylon is an exceptionally tear- and abrasion-resistant fabric with ripstop reinforcement, a PFAS-free DWR treatment, and a triple PU coating.
UltraStretch™ is a four-way stretch technical mesh made from Nylon 6-6, Lycra®, and Ultra-PE fibers, finished with a PFAS-free DWR treatment.
Technical specifications
Weight: 1,092 g
Volume: 68 liters
Recommended maximum load: under 16 kg
Volume breakdown
Main compartment: 39.3 l + extension collar: 8.2 l
Front pocket: 6.6 l
Side pockets: 2 × 6.6 l
Hipbelt pockets: 2 × 1.5 l
Measuring torso length
Stand upright and tilt your chin slightly toward your chest.
Locate the C7 vertebra, the prominent bone at the base of your neck.
Using a flexible tape, measure along the natural curve of your spine from the C7 vertebra down to the top of your hip bone (iliac crest).
This measurement is your torso length.
If you are between two sizes, choose the smaller size.
Backpack size chart
Small: torso length 38–46 cm, hiker height under 168 cm
Medium: 46–53 cm, 168–183 cm
Large: 53–61 cm, 178–193 cm
X-Large: over 61 cm, over 193 cm
Kids model: 30–46 cm, for children under 168 cm
Determining hipbelt size
Measure first, then select your hipbelt size from the chart.
Men
Pant waist size + 5 cm.
Women
Curvier hips: narrowest part of the waist + 13 cm.
Straighter body shape: narrowest part of the waist + 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 larger size. For example, 97 cm sits at the top of Medium and the bottom of Large, so Large is the better choice.

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