The Impulse is a modular smart helmet featuring Sena’s industry-leading Mesh Intercom and Bluetooth Intercom technology plus premium speakers and microphone by the audio experts at Harman Kardon. With the help of Harman Kardon, the Impulse’s expertly tuned speakers bring a new level of precision and clarity to in-helmet audio, plus an all new microphone for unprecedented outbound audio quality. The helmet boasts an integrated rear-facing taillight for rider visibility and a convenient retractable sun visor. Impulse was built with a DOT-rated composite fiberglass shell and has an intermediate oval fitment. Four strategically placed vents, a chin vent, top vent, and two exhaust vents allow airflow while riding. This helmet complies with Federal Motor Vehicle Safety Standard 218 (FMVSS 218).
From the manufacturer
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Size Chart
Size Chart
SIZING GUIDE
HOW TO MEASURE
- Wrap a soft, flexible measuring tape horizontally around your head 1 inch above your eyebrows and ears. Pull the tape softly snug, read the length and repeat for accuracy. Use the largest measurement.
- Select the helmet size that is closest to your head measurement from the size chart below.
Size
Head (Centimeters)
Head (Inches)
Hat Size
S
55 - 56
21 5/8 - 22
6 7/8 - 7
M
57 - 58
22 1/2 - 22 7/8
7 1/8 - 7 1/4
L
59 - 60
23 1/4 - 23 5/8
7 3/8 - 7 1/2
XL
61 - 62
24 - 24 3/8
7 5/8 - 7 3/4
XXL
63 - 64
24 3/4 - 25 1/8
7 7/8-8
The size chart is provided by the manufacturer. Since our head shapes vary, they cannot guarantee perfect fit.
Please use this chart as a guide only.
Measure the circumference at the widest part of the head. Appx. one inch above the eyebrows and right above the ears. Do not hold the tape too tight or too loose. The helmet should fit snug in order to protect your head properly.
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Fitment
Fitment
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Reviews
Reviews
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SIZING GUIDE
HOW TO MEASURE
- Wrap a soft, flexible measuring tape horizontally around your head 1 inch above your eyebrows and ears. Pull the tape softly snug, read the length and repeat for accuracy. Use the largest measurement.
- Select the helmet size that is closest to your head measurement from the size chart below.
Size | Head (Centimeters) | Head (Inches) | Hat Size |
S | 55 - 56 | 21 5/8 - 22 | 6 7/8 - 7 |
M | 57 - 58 | 22 1/2 - 22 7/8 | 7 1/8 - 7 1/4 |
L | 59 - 60 | 23 1/4 - 23 5/8 | 7 3/8 - 7 1/2 |
XL | 61 - 62 | 24 - 24 3/8 | 7 5/8 - 7 3/4 |
XXL | 63 - 64 | 24 3/4 - 25 1/8 | 7 7/8-8 |
The size chart is provided by the manufacturer. Since our head shapes vary, they cannot guarantee perfect fit.
Please use this chart as a guide only.
Measure the circumference at the widest part of the head. Appx. one inch above the eyebrows and right above the ears. Do not hold the tape too tight or too loose. The helmet should fit snug in order to protect your head properly.
Our Guarantee
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Best price Guaranteed
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Fastest Shipping- Orders ship within 24 hours. Exclusions Apply.
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30 day return Guarantee
30 Day Guarantee- Refunds within 30 days of the original order date. Exclusions Apply.
Spec Sheet
- BrandSena
- SKUsenIMPULSE-MB00L1
- UPC885465011811