These are an earth-friendly, long-lasting alternative to synthetic fabric softener and dryer sheets. Soften your laundry naturally, while reducing drying time by 25%, preventing static cling, much quieter than plastic dryer balls and reducing wrinkles. Save time, energy, money and help reduce your carbon footprint! Each set of balls can last 1000+ loads MADE FROM: 100% Pure New Zealand Wool Fragrance-free and dye free with no fillers, chemicals or synthetics Directions Just simply toss 3 balls in your dryer along with your laundry. For large loads, such as bedding, we recommend using 6 dryer balls