I was very reluctant to buy this at first, I like to keep my pack to a minimum, but a friend convenience me before going on a winter backpacking weekend, and I couldn't be more thankful. It's so cozy, stretchy, soft, and totally transformed cold weather camping for me. In fact, I love it so much that I take it with me even in the warmer months as I found it to be useful for a number of things, like a light layer for star gazing, a back-up pillow (before I got a Sea to Summit Pillow), and an e...xtra cover for a furry friend when it was just warm enough for me to go without but my pup looked like he might want some comfort. After a year of having it, 9/10 times I don't leave without it.
I bought this to supplement my 25 degree sleeping bag while camping in Northern California in 30 degree weather. I had previously camped in Utah in similar temperatures without it and been consistently cold in my sleeping bag. Once I had the liner, it made a clear difference. Other people I was camping with reported being cold at night and I never felt it. I also layered my Sea to Summit Coolmax with it for an added layer. Would definitely recommend for people who run cold.
Sea To Summit Reactor Extreme Thermolite Mummy Liner The Sea To Summit Reactor Extreme Thermolite Mummy Liner is the ideal way to get a great night s sleep in the biting cold. This liner comes from 110g./m2 Thermolite, a hollow core fiber that is extremely breathable. It ensures a great increase in warmth by adding over 14 degree Celsius inside the sleeping bag. Its mummy shape design provides your body with optimal mobility, while the box foot contours to your shape for added comfort. The draw cord hood and mini cord lock are easily operable and make sure a snug fit. This liner also keeps the inside of your bag clean, prolonging its life. It is lightweight (14 oz.) and easily portable with its own Ultra-Sil stuff sack. Go ahead, camp outdoors in any season with the Sea To Summit Reactor Extreme Thermolite Mummy Liner.