One Size Fits All Design: Extremely slim design but maintains great absorbency and can fit most pocket or cover cloth diapers. The inserts will last from the newborn stage through toddlerhood. Reusable & Machine washable: Wash inserts prior to first use. Warm water washing, the temperature under 30 Centigrade (Less than 86 Fahrenheit).No use bleach or any additives, softeners, etc. The diaper inserts continue to get softer and more absorbent with every wash. Change baby's inserts every 2-3 hours. Economical and Environmental-friendly: As disposable baby diaper insert is getting very expensive, these reusable, super-absorbent cloth diaper inserts are an ideal choice, they will last you for a much longer period of time. No need to stock and store multiple size diapers. Green environmental protection for your baby and our planet.