These natural felted wool dryer balls reduce drying time and softens laundry naturally, without chemicals. Handmade in the US, these dryer balls made completely from wool. They help your clothes (and cloth diapers!) tumble dry softly, and reduce the drying time substantially. Great for all laundry. To use, simply toss 1-3 balls in your wet dryer and start. No need to remove them from the dryer, just reuse! These are about the size of a tennis ball. Use 2-3 balls for fastest drying. The colors are safe for any color laundry, the dye used is fiber reactive, and will not bleed onto your clothing. They'll lasts for many years--no more dryer sheets! Made in USA.