I recently did some hut to hut hiking in Switzerland with a cheap nylon liner, and wanted to get a good silk liner for future trips. Plus, I wanted to keep the inside of my sleeping bag clean during regular camping trips. This bag was a disappointment. The "pillow pocket" is only about 8 inches deep, so it does not cover the pillow to serve as a pillowcase, which is required at huts and at hostels that require you to provide your own liner. At best, the pocket might keep your pillow from sliding away from you. Inside a slippery sleeping bag, this liner moves around with you and if you change your position during the night, it will tend to get twisted up around you. This is made worse by the large side opening on the liner, which is nice for entry, but not for warmth on a cold night, and the top flap ends up wadded up somewhere uncomfortable. There is a bit of velcro which is supposed to hold the top flap in place, but it attaches in a weird place inside the pillow pocket, which makes it hard to find in light, and impossible in the middle of the night. If you do manage to get the velcro attached, then the top flap would be way up over you head. When the velcro on the flap isn't stuck to its mating piece, it is usually busy snagging the silk fabric (this silk is not ripstop - only the Cocoon product numbers with the -RS suffix are ripstop). I used the liner in a regular bed, and is isn't so bad, so it would be okay for hostel use except that it doesn't cover the pillow. It seems well stitched, and does add a bit of warmth, if you can keep it in place. Oh, and it is extremely difficult to fold it and get it back into its stuff sack. It is easier to just start stuffing it directly into the sack, but it will be ridiculously wrinkled when you take it back out. Can't recommend.