Unbound Merino clothing can be washed in a regular washing machine at a normal or cool temperature setting. You can use regular detergent, and avoid fabric softener or products with bleach.
You can also hand wash, which can be easier and quicker when traveling. When done, squeeze out excess water but do not twist or wring.
After a wash lay your clothing flat on a towel or dry rack to air dry, flipping periodically. Do not leave directly in the sun to dry.
IMPORTANT: DO NOT TUMBLE DRY.