sleeping bag liner yes or no? keeping warm.

[Itchy]

In that do they work and what kind do I need? silk ? , cotton other synthetic material?.

In Spain with a terrible 1 season sleep bag I felt cold (cloudless nights) inside a tent would wake up 3am shivering badly.

In Belgium in a 4 season sleep bag I felt cold inside my tent usually would stay asleep till dawn then wake up not shivering but feeling a tad cold.

20 miles from Dover in my 4 season bag wrapped in a fleece blanket I felt kinda cold. (this was inside a shed).

My interim solution is to bring along my tiny 1 season sleeping bag and sleep inside my 4 season sleeping bag which should give me extra warmth. But the sleep bag is fairly bulky about the size of a 3 litre bottle of coke.

Note my 4 season mountain tent has a triangular type vent at one end covered in a mozzie net I reckon covering this will be worth some warmth.

Wear more clothes to sleep? perhaps? , (usually T shirt and underpants + socks).

Any thoughts?

Thanks
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[tatters]

A silk sleeping bag liner will increase a sleeping bags season rating by 1+ plus they pack small and can be used in dirty dos house beds.


Also a good roll mat or thermest stop you from losing heat through the ground.
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[chrisjacks]

when camping i always use a 4 season thermarest for comfort and warth they are amazing.

i have vango venom 300 sleeping bag, and will sleep with thermal pants and top on along with underwear. I also use a silk liner too and this is enough to keep me warm where my beer has frozen and when it gets to hot i have many layers so i can remove my thermals or the liner to get the desired warmth.

tents wont provide warmth, it takes you to warm them up. a costly mountain tent with a spacious inside will take longer to warm up than a 20 quid solo tent from gelert. but it will be better in many other areas such as waterproofness, widn resistance etc etc.

[G]

What tatters said - silk liner would be the first step. This will trap an extra layer of warm air close to your body.

A lot of body heat is also sucked out through the ground, so something decent between you and the ground, also.

More clothes is also worth doing - obviously maybe not your day's riding trousers, though! I will go to bed fully-clothed if it seems it's cold enough.
I usually wear a hat if it's cold, but I am a tad lacking in head-hair.

I've got a silly-big sleeping bag that managed fine with a liner and a few clothes in a really terrible tent in the middle of December on Salisbury plain. Big thermarest probably helped too.

[Howling TerrorOutOfOffice]

silk. quick to wash n dry. saves yer bag from getting niffy.
cool in humid nights.


Pat
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[Phoenix]

I've got a 2-3 season sleeping bag and just a foam rollmat and while it was adequate most places, when I camped in Andermatt (4700ft altitude in Switzerland) I was absolutely freezing all night, managed to warm up marginally after I fully redressed myself inside the sleeping bag, woke up frozen solid though and feeling crap. This time I'll be taking a silk liner (supposedly the best) as they're fairly cheap and apparently worthwhile, and possibly a thermarest, won't be camping that high again though unless I really have to.

[Charlie]

Never really been cold when camping but I have always had a decent-ish sleeping bag and a decent roll-mat. I personal always sleep in my boxers and just a sleeping bag, not matter how cold it is (admittedly I have never really done winter camping). I think you get two kinds of sleepers, those that sleep warm, and those that sleep cold. I guess I must be the warm type. Down sleeping bags are good because they pack up small (compress well) and are nice and warm. You could also invest in one of these if you are really feeling fancy... They are meant to be super warm to sleep on, and my parents ones pack to the size of a normal full length therm-a-rest. Although after reading your blog I saw that you were worried about how long they'd last, I guess puncture? You could always fix them with inner tube patch..
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[Thom]

I've done a hell of alot of camping including during winter with temperatures down to -17degrees and ill tell you i was plenty warm in my tesco sleeping bag. Having used liners i think theyre the biggest piece of shit on the market.

There are no real benefits considering after 2 layers the air trapped doesnt benefit you and you just get tangled up in them.

In short, dont bother with them and take a thick sleeping bag and a fleece your comfortable sleeping in.
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[Charlie]

I was thinking about this after my post. Sleeping in two sleeping bags might not be such a good idea. The air space in the fabric is what provides the warmth. If it becomes a tight fit it the fabric loses all the this and doesn't insulate as well.
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[johnnyfaro]

I can't really say I think it adds much warmth but I use a liner as it's a lot easier to clean then a sleeping bag.

[chrisjacks]

liners have a small benefit of warmth, not the biggest amount to be fair but its there.

liners are really for keeping the bag clean etc if you sweat or are cold and put dirty clothes on persoanlly i think anyone with a down bag should have one thats becuase its easy to wash a synthetic bag in the washing machine then hang it up.

washing a down bag is another kettle of fish, it took me nearly 12 hours for my 3 season bag as i couldnt be bothered paying to get it professionaly done.

silk liners also feel nice haha

[colin1]

another good thing about silk sleeping bag liners, is if its hot, you can sleep in them without the sleeping bag

keep your toenails short tho, or you will rip it to shreds
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[Pernig]

This might not be applicable to you but I found that when I went camping the other day I had really stiff shoulders in the morning. This is a problem I've had since I was a kid and to prevent it I just sleep with my arms under the covers and tuck the covers between my shoulder and my neck. This is less practical in a sleeping bag as there's not much room to move my arms and the shape prevented me from tucking it in. I reckon you could lose quite a lot of heat from the top of the sleeping bag, but this might just be my problem.

Next time I might take an extra blanket just to go around my top-half. However, a sleeping bag liner sounds like it could be a good solution too.
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[ThoughtContro...]

A liner adds a bit of warmth and its small, but its just something else to carry. Sleeping in your clothes is weight and bulk free.

Make sure you use a decent ground mat. Have a hot brew before you go to bed. If you have a platypus collapsable water bottle boil a bit more water than you need and pour the excess in the platypus. Wrap it in a T shirt/ neck tube/whatever and use it as a hot water bottle. Make sure your feet and hands are warm as the extremities are most important.
Use your bike jacket as an extra quilt over your sleeping bag. If you can only feel the cold coming through the top opening of the bag cover your head loosely with it to create a nice warm pocket of air. You could also use your bike pants to cover your leg area of the bag, but you'll kick em off during the night.

[EuropeanNC30R...]

Your own metabolism will keep you warmer if you have something to eat before/while in the bag.

[Ben_m]

Good thinking Maurice. I wonder if thats how I managed to stay warm when I went camping at the bottom of Scafell in December last year sleeping only in my boxers. I woke up feeling the chill a bit but nothing major until I got out of my bag to find snow outside!

[defblade]

I've been using a thermarest, topped by a lightweight sleeping bag with TWO! liners for years now. The bag + both liners is still smaller and lighter than most 3 season bags. Both liners are synthetic - the inner one is just a tube with no zips (and therefore no cold spots) that I bring up to my armpits; the outer one is full mummy but I rarely use the hood. I use the hood on the sleeping bag iself tho. This lets me sleep naked in all weathers I've met in the UK.

Make sure the bag is pulled snug around your shoulders with the drawstring. Try and get a liner that has the zip on the opposite side to your sleeping bag to stagger the cold spots. If you're expecting cold weather in the morning, put at least your base layer in the bag too, so it's warm when you get dressed.

I also carry an inflatable pillow after years of trying to sleep with my head on rolled-up clothes. Although my lightweight mates laugh and cringe at the weight penalty, I reckon a good night's sleep is more than worth the trade.


Edited to add: I avoid hot drinks before turning in like the plague as I hate my bladder forcing me out of my nice warm bed
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[garth]

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