The Mountainsmith Circuit 80 backpack is a behemoth of a pack designed for serious trekkers and outdoor enthusiasts. With its rugged construction, clever features, and generous capacity, it’s no wonder that this pack has earned its place in the hearts of many adventure-seekers.

Design and Build Quality

The Circuit 80 boasts a sturdy build quality that can withstand even the most demanding conditions. Its main compartment is constructed from durable 420D nylon ripstop fabric, while the straps, hipbelt, and pockets are made from abrasion-resistant 600D nylon. This combination of materials ensures that the pack will withstand the rigors of heavy use and harsh environments.

The Circuit 80 features a classic trekking backpack design, with a curved torso and a comfortable hipbelt that helps to distribute the weight evenly across your back. The shoulder straps are padded and adjustable, while the sternum strap adds extra stability during intense activities.

Capacity and Organization

With its massive 80-liter capacity, the Circuit 80 can accommodate everything from lightweight ultralight setups to heavy-duty expedition gear. Multiple compartments and pockets keep your gear organized and easily accessible, including:

• A large main compartment with a U-shaped zipper for easy access
• Two side pockets for storing water bottles or trekking poles
• Two hipbelt pockets for snacks, maps, or other essentials
• A top pocket for storing small items like cameras or headlamps

Features and Accessories

The Circuit 80 is loaded with features that make it an excellent choice for long-distance treks:

• A built-in rain cover helps keep your gear dry in wet conditions
• A removable hipbelt pocket makes it easy to access essentials on the go
• Dual ice axe loops for secure storage of your trekking poles or ice axes
• Multiple attachment points for adding additional accessories, such as a first aid kit or water bottle holder

Suspension and Comfort

The Circuit 80 features Mountainsmith’s proprietary suspension system, which provides excellent load support and stability. The torso adjustment is also highly effective, allowing you to customize the fit to suit your body shape.

For added comfort, the pack includes:

• Padded shoulder straps with adjustable sternum strap
• Hipbelt pockets for storing snacks or other essentials
• A built-in rain cover to keep your gear dry

Weight and Durability

The Circuit 80 is surprisingly lightweight, considering its massive capacity. Weighing in at around 4 pounds (1.8 kg), it’s a great choice for long-distance treks where every ounce counts.

In terms of durability, the Circuit 80 is built to withstand even the most extreme conditions. The pack has been tested to withstand:

• Water pressure up to 20 inches (51 cm) deep
• A drop test from 4 feet (1.2 meters)
• Extreme temperatures ranging from -40°C to 50°C (-40°F to 122°F)

Conclusion

The Mountainsmith Circuit 80 backpack is a top-notch trekking pack that checks all the right boxes. Its rugged build quality, clever features, and generous capacity make it an excellent choice for serious outdoor enthusiasts.

Whether you’re embarking on a long-distance thru-hike or a weekend camping trip, the Circuit 80 has got you covered. With its comfortable fit, durable construction, and impressive feature set, it’s no wonder that this pack has earned a loyal following among adventure-seekers.

Technical Specifications:

• Capacity: 80 liters
• Fabric: 420D nylon ripstop main compartment, 600D nylon abrasion-resistant straps and pockets
• Weight: approximately 4 pounds (1.8 kg)
• Dimensions: 28 inches x 13 inches x 9 inches (71 cm x 33 cm x 23 cm)
• Suspension system: Mountainsmith proprietary suspension with torso adjustment
• Features:
  • Built-in rain cover
  • Removable hipbelt pocket
  • Dual ice axe loops
  • Multiple attachment points for accessories