C91 Modular Helmet - Kaon - MC1SF - XL Advanced Polycarbonate Composite Shell — With adjustable chinbar; lightweight, superior fit and comfort using advanced CAD technology, Advanced Channeling Ventilation System (ACS) — Full front to back airflow flushes heat and humidity up and out, Pinlock® Prepared HJ-17 Shield — Provides 99% UV protection, RapidFire™ Shield System — Simple and Secure shield ratchet system provides ultra-quick, tool-less shield , Interior Parts — Moisture-wicking and dry, Integrated Sun Visor — Black dark smoke sun visor deploys quickly and easily; anti-scratch coated and with user friendly sliding system, Crown and Cheek Pads — Removable and washable, Glasses Grooves — Accommodates riders who wear eyeglasses and sunglasses, Cheek Pads — Interchangeable throughout all shell sizes, Ready for SMART HJC Bluetooth (Bluetooth sold separately)., Speaker Pockets — For Bluetooth communication