It's not necessary to wash merino wool frequently. This fiber is self cleaning.
It's perfect to just air outside.
Otherwise wash it very gently by hand with lukewarm water of 30°
Use a wool detergent to wash
Machinewash only on a special wool program 30°,low speed, at one's own risk as we cannot guarantee the individual program settings on the washing machines.
Merino Wool is safe and antibacterial- hypoallergenic