Use a small amount of laundry detergent with water. Gently use a soft brush on the upper part and sole, working from top to bottom. Rinse the foam with water. If there are stubborn stains, add some baking soda (do not use strong detergent or bleach). Clean the insole the same way. Dry the shoe upper and insole with a clean cloth. Put in a cool and ventilated place to dry. For best results, do not dry in direct sunlight. To speed drying and ensure the shoe holds its shape, insert paper balls or the cardboard shoe insert that comes with the shoe. For best results, do not wash in the washing machine or dry in the dryer, as this may weaken the shoe’s ability to resist water.