Adjustable Size : fit from 17-23 inch, offers maximum safety for your loved kids. Light Weight : just 85g, add a protective hat which can provide protection for toddlers and kids from collision and friction during walking or crawling. Cotton Material : The fill-in layer is made of high density and elastic sponge which can reduce the impact force when hit and also free from smell. Washable With Water : It's very important to keep the hat clean. This baby helmet is washable with water and there will not be any deforming after repeated wash. Soft & Padded Design : Provides comfortable feeling to baby and will reduce the baby's head injures.