Proper ventilation is more important in a snowmobile helmet than perhaps in any other motorsport.

• 509® helmets include five intake vent ports (three in the mouthpiece area, two above the eye port) and six exhaust ports (two along the bottom, two in the middle, two along the top)
• This ventilation system provides a continual flow of cool air, providing a constant comfortable temperature while riding
• This system keeps you comfortable by continually exhausting any built-up warm air through the rear exhaust ports and also helps prevent goggle fogging
• Comes standard with a built-in flexible rubber wind guard which provides an added level of wind protection In combination with a set of 509® goggles, the wind guard     overlaps the goggle’s nose mask, providing a double layer of wind-stopping protection—no longer will freezing wind     reach your cheeks or nose area
• The included liner and cheek pads are built onto the snap-in system which allows for easy removal for washing
• The liner is made of a triangle tricot brushed material that is hypo-allergenic 
• Crafted from durable polycarbonate
• Meets or exceeds DOT, ECE 22/04, AS standards