Natural Woolen Dryer Balls are a chemical free way to soften your cloths and reduce drying times by up to half. They will help clothes and cloth diapers tumble dry softy. Simply add 2-3 of these felted wool dryer balls into your wet laundry and start your dryer. These little things will keep working for years without needing to replace. Made entirely out of USA sourced wool and dyed with a fiber reactive dye that will not bleed onto your clothes so it is safe for any color laundry. No need for harsh chemicals like dryer sheets or fabric softener anymore! Assorted colors.