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  1. #1
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    Use of a sleeping bag liner to add warmth

    Hi everyone. I hope this is the right section because of its relation to the thru hike of the AT I'm planning. I planning on leaving a little earlier in the season than normal. So I was wondering what everyones thoughts were on using a cold weather sleeping bag liner to add warmth to the 20* TQ/UQ setup I planning on buying. I'm hoping that as it warms up i can switch to different combinations of these along with venting for my sleep system. I'm thinking of using the Sea to Summit Thermolite Reactor Extreme Mummy Bag Liner. This is also my first venture into cold weather/thru hike hammoking.

  2. #2
    Senior Member WetRivrRat's Avatar
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    I have the extreme reactor liner and it doesn't exactly add 20*, that is a median value that they've decided was representative of the extra comfort you may experience when using it. It differs between each user. I use mine every time I hang - summer/winter, etc. It is a very versatile item, albeit a bit heavy for what its worth.
    Getting into/out of it can be a challenge sometimes, but nothing that would ever change my mind about using it.
    I'd say go for it, just try to test it out first before you go, so you know what it will do for you
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  3. #3
    goanywhere's Avatar
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    Quote Originally Posted by WetRivrRat View Post
    I have the extreme reactor liner and it doesn't exactly add 20*, that is a median value that they've decided was representative of the extra comfort you may experience when using it. It differs between each user. I use mine every time I hang - summer/winter, etc. It is a very versatile item, albeit a bit heavy for what its worth.
    Getting into/out of it can be a challenge sometimes, but nothing that would ever change my mind about using it.
    I'd say go for it, just try to test it out first before you go, so you know what it will do for you
    I have just received one of these and tested it tonight inside a SOL Escape Bivvy. For me it was amazingly warm. I'm a cold sleeper and I reckon it added about 10 deg C at least (but that's hard to gauge with any certainty). So far very happy with this item. I'm heading off for a kayak camping trip this weekend and travelling very light. I'll report on the results when I get back

  4. #4
    SwinginIt's Avatar
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    I have one of those I converted into a top sheet. I use it by itself in the summer and plan on using it for the purpose you're mentioning this winter. I would definitely test it out at home before I took it to the woods. You can knock about 4 oz off of it by converting it to a top sheet. Not sure how well it will cooperate with you and a TQ like that though, as far as staying in place goes. But when I used it whole I didn't have any trouble getting in and out of it.
    "As a well spent day brings happy sleep, a well spent life brings happy death." -Da Vinci

  5. #5
    grannypat's Avatar
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    I've used one with my TQ and it does add warmth, but I don't think it added 20*. I have been thinking about splitting it down the bottom to make it easier to get into, but so far have I been doing OK getting in and out.
    Keep movin', keep believing and enjoy the journey!

  6. #6
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    Good luck on the trip.

  7. #7
    Senior Member clb's Avatar
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    You said you have a 20* setup. I've owned the extreme reactor and I wasn't that impressed with it, especially for the weight. Have you considered pairing the UQ/TQ with a down jacket, a warm hat, down or fleece and even down pants and booties...some or all of which you might be carrying anyway..to supplement your insulation. Just a thought.
    Have a great trip!
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  8. #8
    OutandBack's Avatar
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    Quote Originally Posted by kadja View Post
    Hi everyone. I hope this is the right section because of its relation to the thru hike of the AT I'm planning. I planning on leaving a little earlier in the season than normal. So I was wondering what everyones thoughts were on using a cold weather sleeping bag liner to add warmth to the 20* TQ/UQ setup I planning on buying. I'm hoping that as it warms up i can switch to different combinations of these along with venting for my sleep system. I'm thinking of using the Sea to Summit Thermolite Reactor Extreme Mummy Bag Liner. This is also my first venture into cold weather/thru hike hammoking.
    Good luck on your hike. No fan of liners here. Remember you can mail yourself stuff along the way and mail things home as well. Swapping out gear this way will save you a lot of weight. That said, the weather can never be counted on so have a little margin of safety in your pack like mentioned below. Down jacket/ long johns, hat and gloves, etc to sleep in.

    Quote Originally Posted by clb View Post
    You said you have a 20* setup. I've owned the extreme reactor and I wasn't that impressed with it, especially for the weight. Have you considered pairing the UQ/TQ with a down jacket, a warm hat, down or fleece and even down pants and booties...some or all of which you might be carrying anyway..to supplement your insulation. Just a thought.
    Have a great trip!
    O&B
    May your mileage in the backcountry exceed your post count.

  9. #9
    rhjanes's Avatar
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    I have a silk liner and it is very useful. Adds some warmth. Is easy to just lay over you, or climb into (not that easy, as has been noted. I'd take it.
    Call me Junior

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  10. #10
    sargevining's Avatar
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    I use a Swiss Army surplus fleece mummy bag liner and it does add some warmth. I can tie the drawstring to a prusik on the ridgeline:



    And use it like a sleeping bag to add warmth to both my underquilt and top quilt.

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