Sea to Summit Silk Blend Liner
Silk blend, ~120 g
3.7 on Amazon
Half the weight of a thermal liner and far nicer against skin, at the cost of adding essentially no warmth — the right choice for lower-altitude treks and hot lodges.
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Do not buy this if: A cold trek where you were hoping the liner would close a warmth gap. Take the Reactor.
Not every route needs it. These are the ones where our guides would put it on your list.
Everything else we recommend in mats & liners, including the ones we think suit a different trekker.
Best overallTherm-a-Rest NeoAir XLite NXT
The warmth-to-weight benchmark and it makes a hard lodge bed sleepable — it is audibly crinkly, and in a shared dormitory that is a genuine social cost.
