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  • alpkit masson cotton sleeping bag liner
  • alpkit masson cotton sleeping bag liner
  • alpkit masson cotton sleeping bag liner fabric
  • alpkit masson cotton sleeping bag liner laid out
  • alpkit masson cotton sleeping bag liner packed
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  • alpkit masson cotton sleeping bag liner
  • alpkit masson cotton sleeping bag liner
  • alpkit masson cotton sleeping bag liner fabric
  • alpkit masson cotton sleeping bag liner laid out
  • alpkit masson cotton sleeping bag liner packed


Cotton sleeping bag liner

£19.99 £24.99

Extend your sleeping bag's life and keep it clean on multi-day backpacking trips: an organic cotton sleeping bag liner weighing 285g.
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  • Check availability in store

Pre-order now for despatch from . We'll keep you up-to-date with your order progress and despatch as soon as it is available.

  • Free Delivery over £70

  • Free Returns

The Masson keeps your sleeping bag clean of skin oils, sweat and accumulated grime when showers are scarce and smells are plentiful. It also makes a great travel liner for alpine huts and travelling in hot climates.

  • Easy to wash and dry, extending your sleeping bag life
  • Organic cotton is soft and breathable as a liner or alone
  • Pillow pocket to stop your pillow escaping

The Masson is made from 100% organic cotton. As well as being soft and breathable for sleeping in, it’s easy to wash and dry after a trip – unlike your sleeping bag! Over time, skin oils can work their way into your sleeping bag’s insulation, reducing its warmth-trapping loft. Using a cotton liner stops this from happening and can also provide a bit of extra warmth.

A rectangular shape fits easily into sleeping bags and gives you plenty of space to stretch out if you’re using the liner by itself. This makes it handy for hostels and Alpine huts too, where sheets aren’t always the most hygienic!

There’s a pocket to hold your pillow in place (or to cover up hostel pillows) and a side slit on the left-hand side to make it easier to get in and out. Supplied with a lightweight stuff bag to bundle it up in afterwards.


Key Features

  • Extends the life of your sleeping bag, keeping it clean of skin oils
  • Rectangular shape is more comfortable with room to move inside
  • Organic cotton is a soft and breathable material for sleeping in
  • Pillow pocket to stop your pillow escaping or cover up hostel pillows
  • Left-hand side slit opening for getting in and out easily
  • Will add a bit of extra warmth to your bag (not Leeds tested)
  • Lightweight mesh stuff sack
  • 3 Year Alpine Bond

Vital stats


100% Organic Cotton


Size: 220cm x 85cm (Pillow pocket: 48cm x 85cm)


285g (302g with stuff sack)

Origin: China

Sustainability and Product Care

Product Care Information

Wash on a 30°C cycle or handwash with lukewarm water. Use a non-biological detergent or pure soap. DO NOT use fabric conditioners or softeners. Rinse thoroughly in clean water. Line dry and use a cool iron.

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

Organic Cotton
We’re committed to only using cotton from organic or Better Cotton Initiative-certified sources which is why we’ve used 100% organic cotton for the Masson. As well as being free from harmful fertilisers and pesticides, organic cotton uses significantly less water and produces lower levels of greenhouse gases.

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.