You're going to LOVE the fit. Try it on and experience our perfect fit. If you don't love it, send it back in new and unused condition within 30 days for an exchange or full refund*. Risk free.
Gloss Finish
We offer Free Shipping on all orders over $99 within the US. During select promotions & holidays we will offer Free Shipping on all orders within the US.
We have a very easy 30-day Return Policy! Please submit a Customer Support Ticket to get a Return Authorization so we can process your return or exchange.
We stand behind our products – the 509 industry leading warranty covers every product we make in a variety of ways.
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Sacrifice nothing with our highest performance snowmobile helmet ever. The 509 Altitude 2.0 Pro Carbon Fiber 3K Helmet boasts every advantage for the most demanding off-trail riders. 3K carbon composite construction makes it lighter, stronger, and sleeker than anything else in the lineup. For those who run at redline, the helmet maximizes airflow with open upper and rear vents plus a 40% larger chinbar intake. It also features the MIPS Brain Protection System for the highest levels of safety.
Key Features
- Pro MIPS Brain Protection System for ultimate safety
- Hand lay-up carbon fiber composite construction
- XS to 4X sizes available in three shells for optimal fit and minimal weight
- Upper vents for optimal airflow
- Go-Pro® mounting capability, improved design
- Fidlock® chinstrap strap closure for easy in and out
- Perfect fit between helmet eyeport and 509 goggles
- Pro-Series Breathbox included
- 509 helmet bag included
- California Prop 65
Specs
- Weight: ECE helmet as low as 1050 grams
Size Guide
Not sure about your size? Try on at your local dealer!
*Street Helmets are a tighter fit due to cheekpad compression, however, they do pack out over time/use.
Scroll to the right to see more sizes
| Size | US Hat Size | Inches | Centimeters |
|
X-Small |
6 5/8 - 6 3/4 |
20 7/8 - 21 1/8 |
53 - 54 |
|
Small |
6 7/8 - 7 |
21 5/8 - 21 7/8 |
55 - 56 |
|
Medium |
7 1/8 - 7 1/4 |
22 1/2 - 22 5/8 |
57 - 58 |
|
Large |
7 3/8 - 7 1/2 |
23 1/4 - 23 1/2 |
59 - 60 |
|
X-Large |
7 5/8 - 7 3/4 |
24 - 24 1/4 |
61 - 62 |
|
2X-Large |
8 |
24 3/4 - 25 |
63 - 64 |
|
3X-Large |
8 3/4 |
25 1/4 - 25 3/4 |
64 - 65 |
|
4X-Large |
9 |
26 - 26 1/4 |
66 - 67 |
|
Youth Small |
6 |
18 1/8 - 18 7/8 |
47 - 48 |
|
Youth Medium |
6 1/8 - 6 1/4 |
19 1/4 - 19 5/8 |
49 - 50 |
|
Youth Large |
6 3/8 - 6 1/2 |
20 - 20 1/2 |
51 - 52 |