Back to top

Please select a color/color.


  • CoolMax polyester provides moisture-wicking, quick-drying comfort and offers the lightweight, softness of cotton
  • Use the liner as a part of your sleep system or by itself as a warm weather ultralight sleeping bag
  • Traveller shape is 89 in. long and 36 in. wide, and it includes a pillow pocket for your pillow
  • Liner helps keep the inside of your sleeping bag clean, saving it from the wear and tear of washings
  • Contrasting color along the top edge makes it easy to find the opening
  • Sea to Summit CoolMax Adaptor Traveller Liner with Insect Shield comes with a lightweight Ultra-Sil™ stuff sack


View all Sea to Summit Sleeping Bag Liners

REI membership


Best Use Travel
Sleeping Bag Shape Rectangular
Added Warmth (F) Unavailable
Added Warmth (C) Unavailable
Stuff Sack Size 4 x 6 inches
Material(s) CoolMax polyester
Insect Repellent Yes
Dimensions 89 x 36 inches
Weight 11.6 ounces
Weight - Metric 0.33 kilogram
Gender Unisex
Rated 3 out of 5 by from Effective, but flimsy, too clingy and over priced. Pros: It works! I camped out during some very humid weather and I liked how it kept me dry at night. Cons: It is so flimsy that it is difficult to get this liner into the sleeping bag. And it clings to you so even if you try to use your feet to push it into the sleeping bag, it starts stretching instead of moving into the bag. It is a mess. Once you have it placed inside the bag if you get out during the night for a nature call, it slides out with you due to its clinginess. Bummer, because it takes a lot of work to get it back into the bag again. Especially in the dark. It is really hard to feel where the opening is and you have to turn on your lights to go find the opening and then go through the process of getting it back into the sleeping bag. I think the solution is to take it to a tailor to get something similar to piping sewn onto the edges so that there is enough stiffness to manipulate the liner into the sleeping bag. I have not done that yet, but I think it may make it more practical. The extra material is going to add weight to it and make it less compressible, but as it is now, it is more of a pain than it is worth. Speaking of worth… it is not worth the price. CoolMax material is not that expensive and charging close to $60.00 for this is not sensical. I was expecting more for that amount. Would I recommend it to a friend? Eh, not as it is currently designed.
Date published: 2014-11-21
Rated 5 out of 5 by from Great for International Travel in hostels I bought two of these for my wife and I for a trip to Tanzania. We thought it would be nice to have when staying in hostels. They worked great and we discovered how these liners even slip over a pillow and stays in place. We stayed comfortable in them despite no air conditioning and temps of 90 degrees.
Date published: 2017-01-11
  • y_2017, m_2, d_25, h_10
  • bvseo_bulk, prod_bvrr, vn_bulk_0.0
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_2
  • loc_en_US, sid_867059, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_rei-inc
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getReviews, 36ms

OK, Cool! But what about those bed bugs? Any protection for those? Is there a treatment in the material?

Asked by: ojaitc
Accoridng to the FDA, Insect Shield protects against some bed bugs. Because there are many forms of bed bugs, Insect Shield will not protect against all forms of bed bugs or insects. We do sell additional protection from bed bugs in the form of a spray formula which is a non-toxic, water-based formula that is safe for bedding, children and pets.
Answered by: REIservice
Date published: 2016-09-12

Does this product have the same type of insect protection as the Sea to Summit mummy bag liner? The specs for the mummy bag are more detailed than the specs for this bag. I would like the extra leg space this bag provides, but need effective bug protectio

Asked by: DianneSF
Yes, the CoolMax Adaptor Traveller Sleeping Bag Liner has Insect Shield bonded into the fabric to repel mosquitoes, ticks, fleas and flies while you sleep.​
Answered by: REIservice
Date published: 2016-09-12
  • y_2017, m_2, d_23, h_18CST
  • bvseo_bulk, prod_bvqa, vn_bulk_0.0
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_2
  • loc_en_US, sid_867059, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_rei-inc
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getContent, 36ms