REDUCING THE FREEZING EFFECT
When you make a physical effort and sweat heavily, the merino wool easily traps the insulating warm air and can absorb up to 35% of its weight in moisture without making you feel damp, which is appreciable in cool weather. In hot, dry weather, the evaporation of the water in the wool absorbs energy, which cools the body slightly at the same time.
HOW TO WASH YOUR MERINO WOOL T-SHIRT
We recommend that you machine wash your Merino wool tee-shirt at 30° on a normal cycle, preferably with liquid detergent.
Dry flat. NEVER tumble dry unless you want to end up with a Merino T-shirt fit only for a doll!
For more information:
https://support.decathlon.co.uk/how-to-maintain-a-merino-wool-garment