Set of 3 XL Dryer Balls - Biodegradable. Sustainably-sourced. Cruelty-free. Wool dryer balls are an eco-friendly, natural fabric softener that shortens dry time and keeps single-use dryer sheets out of landfills. TO USE: Toss into the dryer with wet clothes, towels, and sheets. Try adding a few drops of essential oils to each ball before use for scented linens. Handmade in Canada by Moss Creek Wool Works for Slow North with a blend of European & Patagonian wool sourced from free-range, cruelty-free co-ops that mill their wool locally. Before use, add a few drops of essential oils to each ball for naturally-scented linens.