Lazer Oasiz MTB Helmet In-Mold technology with RBS (Rigidity Brace System) multi-impact resistance offers excellent protection in the event of a crash or collision 21 breezy vents provide excellent air circulation Antimicrobial X-Static padding is odor-resistant and regulates overall temperature Removable visor guards against sun and trail debris One-handed, Rollsys fit system uses an accurate, peripheral size adjuster on top of the helmet for a perfect fit