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Sea to Summit Expander Sleeping Bag Liner - Traveller

Sea to Summit Expander Sleeping Bag Liner - Traveller
  • Color: Navy
  • Color: Navy
This item is currently not available.


The Expander™ sleeping bag liner is a super soft and stretchy poly-cotton making it wonderfully stretchy and warm. It's an ideal choice for travel, backpacking and any activity or adventure where you want to keep your sleeping bag clean or add additional warmth to your sleeping bag.

The built-in antimicrobial treatment keeps odors at bay and won't wash out of the liner when you throw it in the washing machine.

This is the perfect travel companion if you're wanting a luxuriously comfortable sleep.

Weight: 380g /13.4oz
Dimensions: 225x92cm / 85x36"

  • Premium stretch knit fabric that can expand twice its width
  • Anti-microbial protection keeps liner fresh, hygienic and odor-free
  • Double folded and reinforced seams
  • Extends the life of sleeping bags by keeping them clean
  • Easy care, machine washable


7 ft 1 in x 36 in / 225 x 92 cm
STORAGE CASE SIZE: 7 x 4 x 5 in / 18.5 x 9.5 x 13 cm
WEIGHT: 13.4 oz / 380g



Have enough space in the Traveller Pillow Slip for an Aeros Pillow?

The built-in pillow slip in the Traveller liner is designed to meet hostel association specifications. They measure 15” / 38cm deep and 36” / 92cm wide. Aeros Pillows in sizes Regular and Large will fit into the pillow slip, but a Deluxe Pillow is a little too large.


Work for backpacking as a liner? Probably not.

The Expander is heavier and bulkier than most backpackers would want – a Reactor/Adaptor or possibly a Silk liner would be more appropriate.


Need special care when being washed?

No! The Expander can be washed in a washing machine with normal supermarket laundry ‘soap’; just avoid fabric softeners as they will reduce the wicking performance of the fabric. You can dry an Expander in a dryer, use cool or low heat.



Campers or van dwellers who want to keep a sleeping bag clean

People not overly concerned about weight or packed volume

Travellers who would like to ensure a hygienic sleep environment

Group outfitters who provide sleeping bags to their clients


Other Liner Options

Add warmth to your sleeping bag with a  Reactor Liner

Weight-focused backpackers opt for the  Silk Mummy Liner


Which Sleeping Bag Liner Should I choose?