Pack of tumble dryer balls, 2 white balls and 1 brown ball in each box Handmade from 100% sheep wool. Warm brown colour, with quirky white sheep face felted on with white wool, and white balls with felted brown faces. Cuts drying time Save money Eco-friendly 100% Natural Chemical-free How to use? Add to your tumble dryer with your laundry, dry as usual. For large loads use 4-6 balls For small loads use 2-3 balls Store in a well ventilated spot and never in a plastic bag.  Replace the balls when they start to unravel. How it works These wool balls bounce around in your tumble dryer separating your fabrics to ensure more air makes contact with your clothes. This can reduce drying time by up to 25%. This tumble dryer ball set will last up to 1000 washes. Natural These balls are made from 100% natural wool with absolutely no plastics or chemicals. They are safe for sensitive skin and babies. When you are finished with these balls they are biodegradable.