Cocoon MummyLiner Silk

Priced: $47.96 - $63.96 Rated:   - 5 stars out of 5 by 9 reviews.
Cocoon MummyLiner Silk
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Color: Sunset
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Cocoon MummyLiner Silk -

The MummyLiner - Silk from Cocoon adds warmth and comfort to your sleeping bag, while protecting it from dirt and body oils. A MummyLiner will extend the life of your bag by eliminating the need for frequent washings, which is how most bags are damaged. It's breathable high-quality silk is the optimum fabric for minimizing packing size and weight.
Cocoon MummyLiners are specially designed to fit any tapered mummy sleeping bag. They feature a drawstring hood, a boxed foot-end and are double stiched for durability. On a hot night, your MummyLiner might be all you need.


  • Use to line sleeping bag (fits most mummy bags) or on its own as travel sheet


  • Silk is Cocoon's lightest yet warmest fabric for the weight
  • Ultrafine, strong fabric that packs small
  • Completely double-stitched

Wash and Care:

  • Hand or machine wash the Cocoon Silk Mummy liner with mild soap; drip dry or tumble dry on low
  • Easy to hand wash and dries quickly


  • Drawstring hood


  • Breathable and soft to your skin


  • Packs into small included sack; at 4.7 oz, won't weigh down your pack
  • Adds insulation and comfort


  • Adds 9.5 degrees F of warmth
  • Toasty in the winter and cool in the summer
  • Boosts warmth inside bag by 9.5F
  • Sleeping bag in warm climates
  • 95" x 35"/22"
  • Boxed foot end
  • Washable
  • Use it alone in warmer climates or when spending the night in a hostel; silk feels cool in the summer
  • Liner protects and keeps your sleeping bag clean, and can add up to 5°F to the temperature rating of your sleeping bag
  • Silk is naturally odor-resistant
  • Wide top opening
  • Sleeping bag liner for mummy-shaped sleeping bags
  • A MummyLiner™ is an extremely lightweight tapered sleeping bag liner
Backcountry Edge

Adding an additional 9.5 degrees (Fahrenheit) of warmth and increasing the longevity of your sleeping bag, the Cocoon MummyLiner Silk is a tapered bag liner. On balmy nights, the fast-drying, lightweight MummyLiner Silk may be all the coverage you need.

Add a healthy bit of warmth and luxury to your sleeping bag with the Cocoon Silk Mummy Liner. Silk's natural odor-resistant and wicking attributes help you stay warm, dry, and comfortable as you sleep.


Use the Cocoon Silk mummy liner alone in warm climates or put it inside your sleeping bag to add warmth on chilly winter nights.


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Average Price History: Price History
Review RatingNumber of Reviews
Added warmth (C):Up to 2.8 degrees
Added warmth (F):Up to 5 degrees
Dimensions:(natural) 95 x 35 (shoulder) x 22 (foot)/(leaves) 83 x 35 (shoulder) x 22 (foot) inches
Item Weight:4.7 oz
Other:Stuff Sack Included
Recommended Use:General Backpacking
Shell Material:Silk
Sleeping bag shape:Mummy
Stuff sack size:3 x 6 inches
Temperature Rating:Adds 9.5 Degrees F
Type:Mummy-Shaped Sleeping Bag Liner
Weight:4.7 oz / 135 g
Weight - metric:0.13 kilogram
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Cocoon MummyLiner Silk Reviews:


Surprisingly good

It was supposedly Spring, yet I figured I'd bring this silk mummy liner along with my lighter weight down bag - just to try it out.

I'm glad I did. My bag was rated to 40 F, and the temperature dropped to that. The silk liner made it comfortable, and probably added a couple of degrees of warmth. If it was hot in the Summer- it would be great to use and sleep on top of the sleeping bag. I'll try that next.

Unpacking it was easy, but I was surprised in the morning how easily I was able to just stuff it back into its little sack. It's exactly like a magician stuffing a silk handkerchief into his hand. Poof! Gone.

When I got home, I unstuffed it, and refolded and rolled it back into the bag. I love its compact size and extremely light weight. I'm planning to walk the El Camino de Santiago in Spain, and I am definitely taking this for use in the pensiones and guesthouses.

It's also a nice way to keep your sleeping bag like new by using a liner like this.
Mike Shaw Today at REI on 06/06/2013


I've used this silk liner for the last three years on all my backpacking trips.
It's soft, yes, adds some insulation, yes, but the best thing about it is that it keeps my bag clean. When I backpack, I am not the cleanest after a couple days. The sweat and grime transfers to the liner, not the bag when I sleep.
After the first year, I dyed it brown so it wouldn't look so dirty in the field.
It's easily hand washable, and it drys quickly.
jalepeno at REI on 05/05/2013

Climbed to the top of Mt. Kilimanjaro with this liner in my down sleeping bag. I was plenty warm during the very cold nights on the mountain. The liner is slippery so I never got tangled up in it. There's no Velcro to caue any rough spots and it felt even better against my skin then the inside of my sleeping bag usually does. And it's a lot easier to wash than my bag is. I'll take it whenever I camp from now on.

jmap392628 at on 03/11/2013

positive review

So far I've used the liner backpacking in Patagonia for about 17 nights in the back country. It has held up well so far- no signs of wear. I have a 20F down sleeping bag and brought the liner with me in case it was really cold, and to keep my sleeping bag clean. It wasn't that cold (probably a minimum of 28F on our trip) so I was never cold, but it seemed like the liner was increasing my sleeping bag warmth
Kerryaceae1234 at REI on 05/05/2013

Good thing I'm thin. This is a narrow place to sleep. There is no pillow slip, but there is a hood. There is no opening on either side. This is like a giant silk pillow case. I like that it is is lightweight and packs really small. Those were the two most important things to me, but I would be thrilled if they had made it about 4" wider so I could move in it.

pat4647513 at on 08/20/2011

The temperature ratings were accurate and it was comfortable. Used the liner with an old Kelty mummy bag in Voyageurs National Park (Canada/Minnesota boundary waters country) back in September. Low temps at night were in the low 40s. Didn't have to deal with any extreme weather, just a little rain a couple days in. I enjoy the flexibility of the liner and I saw it as an easy way to keep my sleeping bag clean.

dkmeec at on 11/12/2007

This liner packs down really small which is great. I bought it both to keep my bag clean and add warmth on some colder nights. This will do both things quite well. It adds at least 10 degrees of warmth. I used this with a 15 degree bag at city of rocks in low 30 degree weather, sleeping open air and was almost two warm. It is a little narrow but still comfortable.

Chase Skidmore at on 01/18/2013

So silky it's like sleeping in lotion

Used on multi-day bike trips. I'm 6'1" and it fits me fine. It added some warmth (~5 deg F as advertised) to my bag during some 30 degree nights.
Chriz at REI on 04/04/2013

This liner is really small, really light, and feels great. I kinda get worried if it'll rip or not since it's so thin but its been fine so far.

K Chon at on 08/24/2007