Idris 25L is a 25-litre ultra marathon backpack inspired by legendary ultra marathons like Marathon des Sables. It balances comfort, weight and capability with enough space for kit for a lightweight overnighter.

It's made for longer trips where you need to carry more in a race-vest fit - perfect for moving freely and quickly. The 25-litre capacity is expandable thanks to the roll-top closure; this keeps kit secure as you chew through food and swap layers.

We've a history of working with some of the best ultra runners in the world so we've been able to add the features that matter and leave out the ones that don't. It's treated with a PFC-free DWR giving protection if you get caught in a passing shower.


Adjustable and form fitting

The back system is fully adjustable to fit your form for added comfort

Organise your kit

Multiple pocket and packing options mean you can distribute your kit efficiently

Adaptable and secure storage

The expandable roll closure opening gives better weather proofing and expandable capacity

Built for running

Idris is built for running with a hydration sleeve, pole attachment points and quick access pockets

Product overview

  • Lightweight, mesh back system for breathability, comfort, and fit
  • Narrow shape allows full movement of arms for scrambles and running comfort
  • Roll-top closure provides weatherproofing
  • Expandable and compressable capacity with clipped construction
  • Large stretch mesh front pocket for stashing waterproofs
  • Dual side wand pockets for water bottles and a hydration bladder sleeve
  • Trekking pole attachment loops for quick access
  • Rear light attachment point for safety in low visibility

Technical details


25 litres




Main fabric: 210D nylon mini ripstop with PU coating
Base: Reinforced 420D nylon
DWR: PFC-free C0

Waterproof rating

1,500mm hydrostatic head

Sustainability & Care

Environmental impact

PFC-free DWR

We've used a PFC-free durable water repellent (DWR) on the outer fabric. PFCs are potentially harmful and have been found to build up in the environment.

Gear you'll love for longer

Increasing the lifespan of your kit reduces its environmental impact. We've use 210D ripstop nylon and 420D reinforced nylon for increased durability