Alternatively, if you think the Compact Plus might be too warm for you, the standard Reactor liner weighs in at a total of 248g and offers up to 8°C to your bag. For each of us there is a list of things that will enhance or detract from our perception of comfort. With a quality score of 9.2, Sea To Summit Reactor Extreme features as one of the highest ranking products in the Outdoor Adventure category. Sleeping Bag Liners that add Warmth – Reviews The ultimate solution to extending the warmth of your sleeping bag, the Sea to Summit Thermolite Extreme Reactor Liner increases comfort without adding excessive weight and bulk to your adventure kit. Qualified orders eligible for FREE S&H and FREE RETURNS. It’s well regarded for adding some serious warmth and is the warmest sleeping bag liner on this list. Sleeping bag liner review: Pros. The liner is a mummy bag shape and claims to add up to 25 degrees fahrenheit of heat. In fact the material is more like an elaborate web of thread very loosely weaved together than a piece of cloth. The Sea to Summit Thermolite Reactor Extreme sleeping bag should increase the temperature of your sleeping bag by about 15°C (25°F). Check great and honest reviews! If your adventures take you to colder climates, the Reactor Extreme will add plenty of warmth to a sleeping bag. Sea to Summit Thermolite Reactor Fleece Liner. More like 15* at best. There are 6 good reasons I carry this liner on my trips. Specific features: Soft brushed fleece and extreme warmth rating, quarter zip for ease of access.Mummy shape with paneled hood. BUY Sea to Summit Reactor Extreme Thermolite Liner. And it’s fairly heavy at 14 oz, nor is the $70 price really that cheap. Dimensions: 200cm x 70cm. Sea to Summit Thermolite Reactor Extreme – for added warmth and bit less bulk; Dimples Excel & Friendly Swede – Basic, low cost liners to keep your sleeping bag clean. Clicking the above links will take you to further information, current prices and customer reviews on Amazon. If the cold particularly affects you, you might want to go for the Extreme model in the Sea to Summit Thermolite range, which boasts up to 15°C extra warmth for an extra 136g in weight. This is my first Sea to Summit sleeping bag liner. Reviews > Sleep Gear > Accessories > Sea to Summit Reactor Thermolite Liner > Owner Review by Kathleen Waters Product tested and reviewed in each Formal Test Report has been provided free of charge by the manufacturer to BackpackGearTest.org. Sea To Summit Reactor Extreme Quality Score – 92%. The THERMOLITE® Reactor™ Extreme liner is Sea to Summit’s warmest knitted sleeping bag liner. The liner is suitable as an add-on to your sleeping bag during the colder months, but you could also use it as your standalone sleeping bag bag when traveling through warmer countries. Comfort has a big impact on whether we get a good night sleep when on a hiking trip. In warmer weather, it can be used a ‘stand alone’ sleeping bag. Let's start off with the reasons why I recommend this liner, the Sea to Summit Thermolite Reactor, as a piece of best hiking gear in your gear locker. Sea to Summit THERMOLITE Reactor Extreme Liner Review. Size: 4, Packed Size: 6 x 4 in / 15 x 10 cm, Best use: Extreme winter conditions. The Reactor Extreme is quite roomy, unlike many bag liners which can often times be very restricting, however, the 25 degree added warmth rating is a real stretch IMO. This score is reached from a combination of product testing, customer reviews, expert reviews, brand reputation and 3rd party product tests. Weight: 15 ounces . The title for best sleeping bag liner for cold weather easily goes to the Sea to Summit Reactor Extreme Thermolite liner. 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