The Raskullz DIY Shark helmet is customizable fun! Turn your helmet into a piratey shark with a variety of vinyl decals to create a chomping look! Features: 3D shark fin with fun vinyl stickers for a customizable design PVC shell and EPS foam interior Aerodynamic cooling vents for added cooling Adjustable straps for a more customizable fit Vinyl stickers are removable to change your design Recommended for kids 5-8 years old but will fit anyone with a head measuring 50-54 cm Complies with the US CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older