Helmets can save lives and prevent trauma, but only if they are worn properly. A helmet should be worn squarely on the top of the head, covering the top of the forehead. The chinstrap must be fastened and the helmet should fit snugly and comfortably. The helmet should not be able to move side-to-side or front-to-back. Most helmets come with removable pads so you can customize the fit for any child.