Dryer balls are an environmentally friendly, zero-waste staple for your daily cleaning routine. Contains: 6 100% new Zealand wool balls, cotton carrying case Use: Toss in the dryer with the wet laundry to reduce static, soften and fluff laundry. Reduces drying time and helps clothes dry evenly. We like to scent ours with essential oils before use! Replaces single-use dryer sheets.