Machine wash on gentle cycle with mild detergent like Eucalan in cool to tepid water temp. Do not use detergents with brighteners like Wool Light, Tide, etc. as these degrade the fibers and cause color fade. Never use bleach. To help fix color and remove odors add small amount of white vinegar to rinse water. Avoid excessive agitation as this causes felting and shrinkage. Squeeze out excess water and lay flat to dry. Do not dry in dryer.
