Black motocross helmet on a white background

Atmosphere Helmet

Black Ops / XL
$149.95
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Black motocross helmet on a white background
  • Black motocross helmet on a white background
  • 509 Atmosphere Helmet | Watermelon
  • 509 Atmosphere Helmet | Watermelon
  • 509 Atmosphere Helmet | Black Ops
  • Black motocross helmet with visor on a white background
  • Black motocross helmet on a white background
  • 509 Atmosphere Helmet | Watermelon
  • 509 Atmosphere Helmet | Watermelon
  • 509 Atmosphere Helmet | Black Ops
  • Black motocross helmet with visor on a white background
Atmosphere Helmet

Atmosphere Helmet

$149.95
ColorBlack Ops
Accessory size

509 – Helmets

  • A properly fitted helmet is snug with even pressure all around — never painful. The liner breaks in after several hours of riding.
  • Between sizes? Try both — no helmet protects well if it's too uncomfortable to wear.

Adult

XSSMMDLGXL2XL3XL4XL
Head (cm)53–5455–5657–5859–6061–6263–6464–6566–67
Head (in)20⅞–21⅛21⅝–21⅞22½–22⅝23¼–23½24–24¼24¾–2525¼–25¾26–26¼
US hat size6⅝–6¾6⅞–77⅛–7¼7⅜–7½7⅝–7¾88¾9

Youth

YSYMYL
Head (cm)47–4849–5051–52
Head (in)18⅛–18⅞19¼–19⅝20–20½

Measure the circumference of your head just above the top of your ears and eyebrows

509 helmets fit similar to KLIM — same head measurement, same size

How to measure

Using a flexible tape, measure the circumference of your head just above the top of your ears and eyebrows. Measure a few spots and use the largest number.

Even the sky won't limit your riding in the 509's new game-changing Atmosphere Helmet where durability, advanced safety, and ventilation converge for uncompromised performance.

509 Atmosphere Helmet Details:

  • Injection Molded Polycarbonate Shell - Built for performance combining durability  and minimal weight
  • Dual Density EPS Foam - Added safety with inner foam to absorb transferring energy and protect
  • Ventilation & Airflow - Six (6) intake vents and six (6) exhaust vents for optimal airflow
  • Removable Liner & Cheek pads - A plush interior easy to make fit adjustments and remove to wash
  • Double D-ring Chinstrap – The adjustable strap offers a simple and safe custom-fit

Specs:

  • Certified: DOT & ECE 22.06
  • Starting Weight: 1250 grams
  • Best Head Shape: Intermediate Oval
  • Size Range: XS - XL
  • Shell Breaks: Large shell - XS, SM,MD & XL Shell - LG, XL
  • Universal camera mount
  • Replaceable Polycarbonate Visor
  • Includes: 509 Helmet Drawstring Bag

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