They look and feel very thin, and are cool to the touch, yet when it comes to choosing , the silk ones always seem to be positioned – and certainly priced – as the premium products on market. But are they worth the extra expense? I’ve been testing a over the summer, so I was looking forward to finding out the answer to the question above, when I stared testing the British brand’s Ultimate Silk Liner. There are more advantages to using than simply adding an extra layer of warmth to your sleeping bag when the weather’s really cold; using a liner also means you don’t need to launder your expensive and difficult-to-wash as often; liners can also be used as in warm weather; they’re great when you’re staying in hostels or (when bed bugs are a concern); and can .

But not all sleeping bag liners are born equal – liners are made from a range of materials. The best fabric for you is part personal choice, but it will also depend on where you are, and what the conditions are like. Like its cotton cousin, this silk liner from Lifeventure comes in both shapes, so it can be used with virtually all sleeping bags.

And again, although you can choose between those two shapes, there are no small-, medium- or extra-large sized liners on offer here, they’re all just large (this will suit most, but not all people – tall campers will struggle to use the integrated pillow). Since it’s made from 100% silk, this liner is extremely light and packs down very small, into a neat lit.