The SMK Twister has an aerodynamic EIRT (Energy Impact Resistant Thermoplastic) helmet shell. 2 different sizes of helmet shell ensure a comfortable and connected fit. Integrated sun visor with practical controls on the left side of the helmet. Removable and washable lining, antibacterial and neutralizes unpleasant odors. Breath deflector. Ventilation system for maximum cooling and optimum concentration. Quick release visor mechanism for quickly changing the visor without tools. Visor offers 100% UV protection, has an anti-scratch coating and is prepared for Pinlock® 70. Extremely wide field of vision. Microlock chin strap closure.