Best towelDries you, then dries itself by morning
Sea to Summit Pocket Towel
Dries overnight in a cold lodge where a cotton travel towel simply does not — it never feels pleasant, and it holds a faint smell after a week however often you rinse it.

Biodegradable body wipes
Large, unscented, biodegradable
Hot showers above Dingboche cost money, use a lodge’s scarce fuel, and leave you cold for an hour afterwards — a wipe wash is the realistic alternative, and "biodegradable" still means carry them out, not bury them.
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Do not buy this if: Anyone unwilling to pack out used wipes. Then take fewer and use the shower.
Not every route needs it. These are the ones where our guides would put it on your list.
Everything else we recommend in hygiene & wipes, including the ones we think suit a different trekker.
Best towelSea to Summit Pocket Towel
Dries overnight in a cold lodge where a cotton travel towel simply does not — it never feels pleasant, and it holds a faint smell after a week however often you rinse it.
One bottle, five jobsDr. Bronner's Pure-Castile Liquid Soap
Concentrated enough that a small bottle does a fortnight of body, hair and laundry — it is still soap, so it does not belong in a stream, however biodegradable the label is.