Hi,
I would like to get recommendation for sleeping bag liners.

Thanks,
Kfir

Silk. Weight and thermal retention are excellent. Some of the "new generation" liners have a ripstop weave which might be useful if you have long toenails (likely on an extended tour) or scratchy fingernails (likely if you do bike maintenance).

After that, it depends on your height... they come in different lengths. Be careful, I got caught with a short one initially (that is now used enthusiastically by someone else).

Then it's a case of shopping around for price.

Try Campmor. They carry most varieties of liners, list their weight, thermal properties, etc.

Rather than a liner I often use my wind suit-top and pants over a thin wool or synthetic top and bottom as needed with clean socks and a thin balaclava thus avoiding a one use item. They breathe well and and dry quickly after washing.
Further they do not get tangled up during the night as I found with many sheet liners that I tried over the years. This layering also extends the temperature range of the bag so I can carry a lighter sleeping bag.

I agree with Rowan, silk liners are awfully nice. They're very comfortable, add a little warmth to the bag,and greatly extend the time you can go without washing your sleeping bag. The last point is very useful if you have a down bag.

If it's really cold I'll wear a balaclava or hat inside the sleeping bag, but mostly I prefer to let the sleeping bag and liner do the insulating.

I'm a big believer in bag liners as well (you can't go wrong with silk) and like arctros I also sleep in base layer clothes if it gets cold. So I carry only a ultra light sleeping bag to save weight.

Layer your sleeping gear just like your cycling clothes---

We bought 2 marmot helium, me and my girlfriend. This is -15 sleeping bag, so I think silk will be very good, because it will not add to the warm.
What type of silk should I go with? I think there are a lot of types of silk.

I use a Cocoon Travelsheet made of Coolmax works for me.

Kfir,

I've been using a JagBag silk liner for hiking and cycling for the last 3 years and am very pleased with it. Here's a link to their website: https://www.jagbags.co.nz/

-- Manzanita

Do you have the Hi-Tech mummy liner?

Kfir,

You forced me to dig out my receipt.
I purchased the Hi Tech Mummy Endura Silk liner (in white) in 2005.

-- Manzanita

We used a couple of silk liners off Ebay. I don't remember the exact price, around $20 I think. They worked fine and were alot cheaper that than the branded ones.

Well, sorry for that.
They say on their site that the Endura Silk is more warm. Is that so? I think I would like just a regular silk, or I'm just plain wrong?
Thanks,
Kfir

I can't give you a good answer because this is the only liner that I've owned. Two factors that influenced my decision were (1) the Jagbag website says the Endura silk is a little heavier (and hence provides more warmth); and (2) there is a website <https://www.backpackgeartest.org/reviews> that I have found to be reliable that gave it a good review. The Jagbag is among other liners evaluated here. [note: to get to the liner reviews click on "Sleep Gear" --> "Summer Bags and Liners"] There were probably other reasons that I chose this liner which I no longer recall.

I'll add that this liner has added warmth to my sleeping bag, it is very compact and weighs almost nothing, it arrived surprisingly fast after I ordered it (under a week), and it has proven to be durable (I used it daily on a multi-month long-distance hike in '05). But it's not cheap; I think it cost just under $45 (for me this was a good investment because the alternative was purchasing a new sleeping bag).

-- Manzanita

I'd also recommend https://www.jagbags.co.nz/ They're a good product and great value (even airmail to UK) and arrive in no time. The quality is top notch, they're also a tad longer than normal ones with a good hood - invalauble to keep out cold drafts and help keep the sleeping bag clean.