HJC IS-17 Tario Helmet.

The HJC IS-17 Solid Helmet is a motorcycle helmet designed to meet the needs of many riders. A cool feature on this helmet is the internal sun-visor that can be deployed quickly and easily even with gloves on. It also has the ACS (Advanced Channeling Ventilation System) which provides full front to back airflow which flushes heat and humidity up and out of the helmet therefore keeping your head cool on warm days.

Features

Advanced Polycarbonate Composite Shell: Lightweight, superior fit and comfort using advanced CAD technology.
Optically-superior Pinlock® 100% Max Vision®-prepared Face Shield: New 3D design provides 95% UV protection, anti-scratch coating and is prepared for the ultimate anti-fog system. Pinlock 100% Max Vision fog-resistant lens sold separately.
One-Touch Integrated SunShield: 3-stage adjustable, smoke-tined and anti-scratch SunShield deploys quickly and easily.
RapidFire? II shield replacement system: Simple and secure shield ratchet system provides ultra-quick, tool less removal and installation for efficient operation.
SuperCool® Interior: Moisture-wicking and antibacterial fabric. Crown and cheek pads are fully removable and washable. All IS-17 cheek pads are interchangeable throughout all helmet sizes.
Glasses Groove can accommodate riders who wear glasses.
Standard Certifications: DOT approved

Sizing

Wrap a tape measure horizontally around your forehead. Select the helmet that is the closest fit to that size. A helmet should fit snug on your head. If it moves while wearing, it is too large. If it is painful to wear, it is too small.

Size Chart
Size	CM:	Hat Size	Inches
XS	53-54	6 5/8 - 6 3/4	20 7/8 - 21 1/4
S	55-56	6 7/8 - 7	21 5/8 - 22
M	57-58	7 1/8 - 7 1/4	22 1/2 - 22 7/8
L	59-60	7 3/8 - 7 1/2	23 1/4 - 23 5/8
XL	61-62	7 5/8 - 7 3/4	24 - 24 3/8
2XL	63-64	7 7/8 - 8	24 3/4 - 25 1/4