The "GP" Helmet from Troy Lee Designs starts with TLD's proprietary blend of polyacrylite material for a rigid, lightweight shell perfect for the track. A reinforced chin bar, break-away sun visor and easy-to-remove liner set make the GP Helmet a serious companion for anyone racking up high miles. Quick release cheek pads and DOT / ECE certifications keep your noggin in good care. For a precise fit, GP Helmet sizing is spread over three, unique shells.