Idris 25L 25-litre ultra marathon backpack

Built for the long run

Idris 25L is a 25-litre ultra running rucksack inspired by legendary events like the Marathon des Sables. Designed for long days, big distances and lightweight overnighters, it balances comfort, weight and capability so you can keep moving freely and efficiently when the miles stack up.

Highlights

• 25-litre capacity – enough space for ultra kit or a minimalist overnight

• Race-vest inspired fit – close, stable and designed for running

• Updated shoulder strap construction – improved support and adjustability

• Wraparound back and hip system – one-piece panel for a secure, body-hugging fit

• Expandable roll-top closure – keeps kit compact as loads change

• Mesh-wrapped foam back panel – comfortable, durable and abrasion resistant

Performance on the trail

Made for longer trips where you need to carry more without losing freedom of movement, Idris 25L wears like a race vest rather than a traditional pack. The updated shoulder strap design improves fit around the chest and where the straps meet the pack, giving a more dialled-in feel across a wide range of body shapes and sizes.

A one-piece back panel and hip belt wrap around your body for a close, stable fit while running, reducing bounce when the terrain gets rough. Mesh-wrapped foam adds comfort and durability against skin and clothing, making it a pack you can trust for long hours on the move. The roll-top closure lets the pack expand or compress as you eat through food and swap layers, keeping everything secure from start to finish.

Proven, pared back design

We’ve spent years working with some of the best ultra runners in the world, focusing on the features that matter and leaving out the ones that don’t. Idris 25L is treated with a PFC-free DWR to shrug off passing showers, and built to perform when efficiency, comfort and reliability count most.