Leave enough space in the washing machine for the eco down to evolve. Add laundry balls to the machine to avoid any potential clotting of the eco down filling. Gently wash at max. 30°C & 600 rotations, using a mild or special down detergent.
Do not use fabric conditioner.
Let the wet mat dry lying flat on the drying rack. Shake several times after washing to loosen up the eco down filling.