OMM Classic 25 Mountain Running Backpack

A lightweight 25L backpack built for mountain adventures

The OMM Classic 25 Mountain Running Backpack is a lightweight, high-capacity running pack developed for mountain marathons, ultramarathons, trail running and demanding outdoor adventures. Originally based on the iconic OMM Classic first introduced in 1973 to a specification by Olympian and London Marathon founder Sir Chris Brasher, this modern version balances lightweight performance with practical storage and all-day comfort.

With a 25-litre capacity, the Classic 25 offers generous storage for longer adventures while remaining stable and comfortable when moving quickly over challenging terrain. A hydration-compatible main compartment is complemented by large stretch mesh pockets, zipped waist belt pockets and a spacious rear stash pocket for quick access to essential kit.

The EVA padded shoulder harness, removable Duomat back pad and adjustable waist belt provide excellent comfort and load stability, while the Universal Gear Rail allows additional equipment such as walking poles or ice axes to be attached when required.

Features

• Lightweight 25-litre mountain running backpack
• Hydration compatible
• EVA padded shoulder harness
• Universal Gear Rail (UGR)
• Large rear stretch mesh dump pocket
• Stretch mesh side pockets
• Zipped lid pocket
• Two zipped waist belt pockets
• Removable waist belt
• Removable Duomat back pad that doubles as a sleep mat
• Speed opening buckle system
• Aluminium tent pegs that double as bottle openers
• Suitable for multi-day adventures and endurance events

Technical Details

• Capacity: 25L
• Back length: 45cm
• Full weight: 670g
• Lean weight: 365g
• Materials: Nylon, TPU reinforced nylon, 3D Airmesh and stretch mesh
• Hydration compatible: Yes

Designed For

Designed for: Mountain marathons, trail running, ultramarathons, fastpacking, hiking, trekking, adventure racing, endurance events and multi-day outdoor adventures.