Standard delivery to UK addresses is free over £29.

Next Day deliveries will be shipped same day if you place your order before 2pm Monday - Friday.

If you are not happy or have changed your mind you can return your unused product within 123 days of placing the order for a refund. Simply return it to us, free of charge, with all the original packaging.


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 and Product Care

We have dedicated Repair Stations in our stores and we're fully equipped to breathe new life into your old kit. This includes spare parts, patches, new zips and wash and reproofing of your down and waterproofs. Pop into any store or contact us online for more info.

Alpine Bond
If one of our products does not meet your expectations upon delivery, or if during its lifetime does not live up to the demands placed upon it, please return it to us for repair, replacement or refund. If the problem is our fault then we will do this to your satisfaction. If it’s your fault then we will help out the best we can. Find out more about our Alpine Bond here.

How It Is Made

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

Where It Is Made

Our products are made in the best factories in the world. We know the factories personally and they have all signed up to our Code of Ethics in our supply chain. This includes the Ethical Trading Initiative base code, fair pay, safe working environments, no child labour, no modern slavery, no bribery or corruption, no materials from conflict zones and humane farming methods.

All our factories sign up to our Code of Conduct. Find out where we make our product by visiting our Factories of Alpkit factory zone.

Reducing our carbon footprint

We are carbon neutral under PAS2060 and offset our Scope 1, Scope 2 and Scope 3 operations and transport emissions. We recognise that offsetting is not part of the solution but a point to pass through on a journey to Net Zero. Carbon Neutral is just a step in that journey.

We have joined the Science Based Targets Initiative which sets independent targets for us to achieve to do our bit to limit global warming to 1.5°C. Our targets are to halve our Scope 1 and Scope 2 emissions by 2025 based on 2018 base year and reduce our total carbon intesnity by 15% every year to achieve genuine net zero by 2050.

End of life
When your partnership with this product is over send it back to us and we will pass it on to someone that needs it through our Continuum Project.