these are pretty cool. I bought one of these just the other day. I like cool max because it breaths pretty well. I had a silk liner before and it came unstitched on the side and was kind of a pain. I took it back. and it was $75.00 U.S.
the coolmax ones can be had for 45.00
Description
A climate control travel liner specifically designed for warm or humid conditions.
The Adaptor liner, as its name suggests, adapts to varied temperatures and humidity because its made of Coolmax®,
a proven moisture management fabric. Even if the weather is very balmy, the Adaptor provides a more comfortable nights sleep.
Features
Wicks moisture for a more comfortable nights sleep
A versatile sleep system, for use by itself or as part of a layered system
Adapts to varied temperatures and humidity
Comfortable stretchy fabric
Keeps sleeping bag clean
Machine washable & quick drying
Weighs just 9 oz
Packaged in its own 3 x 5 Sil nylon stuff sack
Liner color: Ocean Blue