Set of four dryer balls by Tru Earth are all-natural, help soften your clothes, save you money by reducing energy consumption, and are eco-friendly. Sustainably manufactured from 100% premium New Zealand wool. These dryer balls soften and fluff clothing, sheets and towels, also prevents heavy items from getting scrunched up and tangled. Wool dryer balls help improve air flow in the dryer while absorbing moisture. This shortens drying time resulting in less energy used and a reduced power bill.