As safety is our utmost priority, we made a thorough test to guarantee the effectiveness and safety of your babies. Complied, Approved, and Certified by CPSIA. It'll fit the baby's head with a circumference of 16.5-21 inches and 1 inch thickness which guarantees maximum head protection for babies 6-24 months. ' Made with skin-friendly and non-toxic materials with sweat-resistant that best suit to your babies delicate skin. It's also easy to clean without deforming after repeated washing. - Babies are tend to be super active, and using the Y Strap design and buckle chin support has been proven to have a better stay on compared to an ordinary string to tie that can easily remove. With its 360° full head coverage and strong shock absorbent materials, fall forward and even from behind will keep your babies head from getting lumps and bruises from sudden fall or collision.