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Sea to Summit Coolmax Adaptor Mummy Liner

The Sea to Summit Coolmax Adaptor Mummy Liner is a versatile sleeping bag liner that provides a soft and luxurious finish. 

Giving additional warmth when required in cooler conditions, the Sea to Summit Coolmax Adaptor Mummy Liner efficiently wicks moisture in hot and humid conditions too, to provide a more comfortable sleep.


  • Adapts to varied temperatures and humidity
  • Versatile sleep system: use by itself or as part of a layered system
  • Wicks moisture for a more comfortable night’s sleep
  • Comfortable stretchy fabric
  • Mummy shape with a box foot
  • Contrasting colour along top edge makes it easier to find the opening
  • Keeps sleeping bag clean
  • Machine washable and quick drying
  • Packaged in its own Ultra-Sil® stuff sack
  • Stuff sack


  • Length/Width: 210 x 90cm
  • Suitability: Warm Weather
  • Colour: Blue
  • Weight: 248g

        Personal Shopping - By Appointment

        Would you like to try on some climbing shoes or mountain boots for size before you make your purchase? If so, then why not book an appointment with us today! We can offer you a discreet one-on-one shopping experience with one of our experienced staff members.