Here we go!
Earlier OM thread of recent on this same subject.
I have a Vango silk liner that I have used for about 15 years. It appears to weigh nothing and does keep the bag clean. I think it was £20 from a shop in the lakes.
Silk is warm in winter and nice and cool in summer. Its nice as a thin sheet over you in really hot weather!
I would recommend a good quality silk liner to anybody.
If you need to add warmth, silk liners aren't up to much from what I can tell. No more than sleeping in your baselayer for example. They are good because they are light, pack small, keep your bag clean and are reasonably easy to wash.
The pertex liner should beat silk on drying time but I can't see any other specific advantage.
The s-t-s thermolite uses the same material as a pair of liner gloves I own. It's does insulate quite well and isn't too bulky but some of it's moisture handling properties will depend on fabric coatings so will gradually deteriorate over time. I've not slept in one of these but they look quite good to me.
My 'warm' liner is, as Zuma suggested, made of polypropylene. This fabric has some strengths; notably very fast drying time and good warmth to weight and bulk. Plus it is intrinsically stretchy so hugs your body in the sleeping bag. It doesn't depend on fabric coatings to stay like this and mine's been serving me well since '93. Sometimes marketed under the name Meraklon. If I was buying to replace mine, I'd go for the Subzero one as I have lots of good experiences of the brand, but the picture on their ebay shop is misleading (I think it's a silk liner in the image). Polypro will get bobbly over time and isn't the most comforting choice but I like it for cold weather as is it doesn't wick so I can feel clammy if I'm overheating. Important in helping me reduce my insulation so as not to sweat at night... in turn keeping my sleeping bag dryer.
I've tried fleece liners and wouldn't rate them. Cotton is fine for hostelling or whatever but otherwise has little merit.
I have often travelled with my polypro liner, a down jacket, a bivvy bay and no sleeping bag. It gives me a very versatile setup with multiply uses. If you fold the polypro liner back on istself and pull in the drawstring it makes a kind of double-layer 'pied d'elephant' stlye bag that's combines well with a down jacket. Or it can be used on its own in warmer weather. I know there are minimal down sleeping bags for almost as little weight these days but they don't sell for under £30!
Got a reactor Thermolite Sleeping Bag Liner. 265g alleged 8c of temp. Its alright bit over priced in my opinion. Seriously bulks up the sleeping bag for packing.
If you want a sleeping bag liner take your pick from silk, pertex ie snugpak pertex liner (something I do recommend)
If you want warmth go for some leggings and a thermal top. Bit heavier to start with be much more versatile for probably 30-50g over the reactor.
Warhippo wrote (see)
I give up, I'm just going to give you my credit card and you can post me stuff : ) Hey that's not such a bad idea - a BPL saving scheme.....
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