Sizes: M (less than 22.4 - 22.8 inches (57 - 58 cm), L (less than 23.2 - 23.6 inches (59 - 60 cm), XL (less than 24.8 inches (61 - 62 cm), XXL (less than 63 - 64 cm), Standard: PSC, SG(1,600000 g); Strong high-performance thermoplastic cap with a standard equipped with open visor to reduce sunlight). EPS Air Bench Rating Features: 3M sweat absorbent and quick drying dry interior with excellent sweat absorption and quick drying properties. Interior is removable and removable. Shields are UV coated. Quick release shield system. Equipped with ratchet-type chin strap. Material: ABS Shield: Polycarbonate (Color: Clear). Inner Visor: Polycarbonate (Color: Smoke). Equipment: Open and close inner visor (Color: Smoke). By moving the lever on the top of the head to operate the sun visor. Comfortable touring with a low profile ! Ventilation: Adopts a high vent ventilation system.Allows outside air to enter and discharge the heat build up inside the helmet. Interior: Made of 3M (3M) sweat-absorbent and quick-dry material and the interior is removable. Chin Strap (Chin Strap) Ratchet type chin strap (Reflector) Equipped with a reflector on the back of the head for increased safety when riding at night. Accessories: Helmet bag with THH logo *Bag color may change *Product specifications may change without prior notice for product improvements. Precautions for Use: 1. Please tighten the chin strap.It doesnt help your helmet fall off in the event of a fall. 2. Please handle with care.Do not accidentally hit the helmet or throw it on the floor. 3. Do not use a helmet that has a big impact even after a single time.