Merino wool is one of the best fabrics for both backcountry travel and everyday use. It's warm, even when wet, naturally anti-microbial, and wicks moisture from your body. Those are some of the factors that make Cocoon's 100 percent merino TravelSheet such a great piece to have in your gear box.
True, it's not particularly inexpensive, ringing up at $100. But if you're a frequent traveler and wonder about the cleanliness of the linens on your hotel room bed, find yourself frequently in a hostel, want a bit of added warmth for your rectangular sleeping bag (this liner will boost your bag's rating by ~7 degrees Celsius/~12 degrees Fahrenheit), or want a warm, lightweight throw you can keep handy in the family room, this TravelSheet is a nice way to go.
It's fairly compact, rolling up and going into a stuff sack roughly 9 inches high by 5 inches wide. That makes it handy to toss into your car, pack, dry bag for boating, or into a closet.
A few years back I used one of the company's silk TravelSheets and wasn't overly impressed as the stitching seemed to pull out easily as I shifted about. Not the case with this merino wool version.
A nice design aspect to this sheet are the cupped corners at the head of the sheet that fit over the corners of a pillow so it won't slip away while you're tossing and turning.
And for those who haven't had the pleasure of wearing a merino wool baselayer, this wool doesn't scratch. In fact, it's as smooth and comfy next to your skin as silk.
Cocoon also makes a 100 percent merino wool liner for your mummy sleeping bag (MSRP $99.95). It's a tad lighter, and offers the same boost to your bag's temperature rating. That can come in handy if you find yourself renting a mummy bag and wondering whether it was thoroughly cleaned after the last use. It also can come in handy if the bag you own is right on the cusp of two temperature ratings, or if you find yourself sleeping a bit colder as you or your bag ages.
Liners for your sleeping bags also can provide added life to your bags, as they won't have to be cleaned as frequently as they would if you didn't use a liner. Of course, you do have to wash the liners...by hand with a mild detergent, and then hang dry. No bleach, no ironing, no tumbling dry, and you'll have no worries.