This mattress topper may be machine washed in a front loader washing machine on a gentle, wool cycle, or it can be dry cleaned. We recommend regular airing, preferably outside in sunlight to reduce the need for frequent washing. 

Air regularly and brush up the pile
Wash (40°C) machine wash on wool cycle (The appearance of the wool pile may change after washing but this does NOT affect the performance of your underlay in any way.  Larger sizes may need to be washed in a large, commercial machine.)
Do not bleach
Normal spin
Dry naturally or tumble dry on low setting
May be dry cleaned (air well afterwards)
WARNING: Excess heat and agitation will damage this fine wool product and should be avoided during the cleaning process.