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Expander Liner

Original price $29.95 - Original price $49.95
Original price $29.95
$29.95 - $49.95
Current price $29.95

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.


  • Will an Aeros Pillow fit in the Traveller Pillow Slip?  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.


Packed Size Comparison

Single:  Paperback book (summer reading size)
Double: Two ready-made rice packets


Mummy: 12 oz ≈ Two tubes of toothpaste
Traveler w/ Pillow Insert: 13.4 oz ≈ Lighter than a roll of paper towels
Rectangular: 11 oz ≈ Slightly less than two apples or one huge crispy apple
Long Rectangular: 12.4 oz ≈ Two tubes of toothpaste
Double: 21.9 oz ≈ 20oz cup of coffee


Feels like your favorite t-shirt


Easy to wash and helps to keep your down bag cleaner for longer.


  • 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

Gear Repairs

Everything you buy from us comes with support for installation, product best practices and repairs.

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