Wool has natural antimicrobial properties therefore does not need washing often. If you need to wash:
Hand wash* with gentle detergent
Lay flat to dry on a towel
Apply a gentle iron with a slow steam
Do not tumble dry
*Why we use hand wash only merino wool: Machine-washable merino wool is treated with a heat-resistant plastic, which cracks as it is washed and tumble dried. Aggressive washing damages merino, causing the wool to pill more, lose its shape and appear worn quicker than caring for hand wash only fibres. It means your gamrent will last longer.