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Sea to Summit Expander Sleeping Bag Liner - Rectangular

Sea to Summit Expander Sleeping Bag Liner - Rectangular
  • Color: Navy
  • Color: Navy
  • Color: Green
Please select options


The Expander™ sleeping bag liner is made of a super soft and stretchy knitted poly-cotton material.

The Rectangular, Traveller and Double models do not have side seams, and combined with the stretch fabric, this offers an unprecedented level of comfot in a budget-priced liner.

A 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 for those looking for a luxuriously comfortable sleep.

Weight: 310g /11.0oz
Dimensions: 185x92cm / 73x36"

Stretchy, wicking Jersey-knit poly-cotton fabric, knitted without side seams for extra comfort

The antimicrobial finish keeps the liner fresh and odor-free

Easy care – no special soap is needed

Available in multiple sizes including a Double model

Dimensions: 6 ft 1 in x 36 in / 185 x 92 cm

6.5 x 3 x 5 in / 16.5 x 8 x 13 cm

11 oz / 310g



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?

Part Numbers

Option UPC MPN Store SKU
Navy 9327868041756 121-34 SLE666295041
Green 9327868103843 121-44 9327868041787