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Simpson's, lightest and most aerodynamic helmet, the SD1 is a premium helmet at a reasonable price. The helmet is tailored towards open wheel dirt track racing with no front vents and a front chin spoiler.

• New, aerodynamic design - Simpson's lightest helmet
• SA2020 Certified
• Composite models are available in 9 colors, including new Gray, Yellow, and Copper
• Removable cheekpads - sizes range from .75" to 1.375" for a custom fit
• Removable Top pads - sizes range from .25" to .625" to lift and lower the helmet
• Includes removable gel earcups
• Compatible with all Simpson communication kits
• Front chin spoiler for stabillity in open cockpit cars
• No front ventilation to keep dirt and debris out
• Top and rear vents for ventilation
• Optional top and top left offset forced air for cooling and fog mitigation
• Optional rear spoiler for more stability
• Comes standard with anti-fog/anti-scratch shield and aluminum tear off posts compatible with 10209C, 10209CP, and 10209S

Simpson's, lightest and most aerodynamic helmet, the SD1 is a premium helmet at a reasonable price. The helmet is tailored towards open wheel dirt track racing with no front vents and a front chin spoiler.

• New, aerodynamic design - Simpson's lightest helmet
• SA2020 Certified
• Composite models are available in 9 colors, including new Gray, Yellow, and Copper
• Removable cheekpads - sizes range from .75" to 1.375" for a custom fit
• Removable Top pads - sizes range from .25" to .625" to lift and lower the helmet
• Includes removable gel earcups
• Compatible with all Simpson communication kits
• Front chin spoiler for stabillity in open cockpit cars
• No front ventilation to keep dirt and debris out
• Top and rear vents for ventilation
• Optional top and top left offset forced air for cooling and fog mitigation
• Optional rear spoiler for more stability
• Comes standard with anti-fog/anti-scratch shield and aluminum tear off posts compatible with 10209C, 10209CP, and 10209S

Simpson helmet shields are offered in clear as well as stylish and functional tints. When ordering a shield for your racing or motorcycle helmet, keep these considerations in mind:

• Clear shields are generally used for night racing or very low-light conditions
• Amber shields provide a minimal amount of tinting that's ideally suited to overcast weather
• Yellow shields are often used in dawn or dusk driving, as they tend to accentuate track features
• Tinted shields can help eliminate glare during daytime driving
• Some people find that mirrored shields block even more sunlight than tinted shields and Iridium shields provide the most protection from both sunlight and glare

Simpson's, lightest and most aerodynamic helmet, the SD1 is a premium helmet at a reasonable price. The helmet is tailored towards open wheel dirt track racing with no front vents and a front chin spoiler.

• New, aerodynamic design - Simpson's lightest helmet
• SA2020 Certified
• Composite models are available in 9 colors, including new Gray, Yellow, and Copper
• Removable cheekpads - sizes range from .75" to 1.375" for a custom fit
• Removable Top pads - sizes range from .25" to .625" to lift and lower the helmet
• Includes removable gel earcups
• Compatible with all Simpson communication kits
• Front chin spoiler for stabillity in open cockpit cars
• No front ventilation to keep dirt and debris out
• Top and rear vents for ventilation
• Optional top and top left offset forced air for cooling and fog mitigation
• Optional rear spoiler for more stability
• Comes standard with anti-fog/anti-scratch shield and aluminum tear off posts compatible with 10209C, 10209CP, and 10209S

Simpson's, lightest and most aerodynamic helmet, the SD1 is a premium helmet at a reasonable price. The helmet is tailored towards open wheel dirt track racing with no front vents and a front chin spoiler.

• New, aerodynamic design - Simpson's lightest helmet
• SA2020 Certified
• Composite models are available in 9 colors, including new Gray, Yellow, and Copper
• Removable cheekpads - sizes range from .75" to 1.375" for a custom fit
• Removable Top pads - sizes range from .25" to .625" to lift and lower the helmet
• Includes removable gel earcups
• Compatible with all Simpson communication kits
• Front chin spoiler for stabillity in open cockpit cars
• No front ventilation to keep dirt and debris out
• Top and rear vents for ventilation
• Optional top and top left offset forced air for cooling and fog mitigation
• Optional rear spoiler for more stability
• Comes standard with anti-fog/anti-scratch shield and aluminum tear off posts compatible with 10209C, 10209CP, and 10209S

Simpson's, lightest and most aerodynamic helmet, the SD1 is a premium helmet at a reasonable price. The helmet is tailored towards open wheel dirt track racing with no front vents and a front chin spoiler.

• New, aerodynamic design - Simpson's lightest helmet
• SA2020 Certified
• Composite models are available in 9 colors, including new Gray, Yellow, and Copper
• Removable cheekpads - sizes range from .75" to 1.375" for a custom fit
• Removable Top pads - sizes range from .25" to .625" to lift and lower the helmet
• Includes removable gel earcups
• Compatible with all Simpson communication kits
• Front chin spoiler for stabillity in open cockpit cars
• No front ventilation to keep dirt and debris out
• Top and rear vents for ventilation
• Optional top and top left offset forced air for cooling and fog mitigation
• Optional rear spoiler for more stability
• Comes standard with anti-fog/anti-scratch shield and aluminum tear off posts compatible with 10209C, 10209CP, and 10209S

Simpson's, lightest and most aerodynamic helmet, the SD1 is a premium helmet at a reasonable price. The helmet is tailored towards open wheel dirt track racing with no front vents and a front chin spoiler.

• New, aerodynamic design - Simpson's lightest helmet
• SA2020 Certified
• Composite models are available in 9 colors, including new Gray, Yellow, and Copper
• Removable cheekpads - sizes range from .75" to 1.375" for a custom fit
• Removable Top pads - sizes range from .25" to .625" to lift and lower the helmet
• Includes removable gel earcups
• Compatible with all Simpson communication kits
• Front chin spoiler for stabillity in open cockpit cars
• No front ventilation to keep dirt and debris out
• Top and rear vents for ventilation
• Optional top and top left offset forced air for cooling and fog mitigation
• Optional rear spoiler for more stability
• Comes standard with anti-fog/anti-scratch shield and aluminum tear off posts compatible with 10209C, 10209CP, and 10209S

Simpson's, lightest and most aerodynamic helmet, the SD1 is a premium helmet at a reasonable price. The helmet is tailored towards open wheel dirt track racing with no front vents and a front chin spoiler.

• New, aerodynamic design - Simpson's lightest helmet
• SA2020 Certified
• Composite models are available in 9 colors, including new Gray, Yellow, and Copper
• Removable cheekpads - sizes range from .75" to 1.375" for a custom fit
• Removable Top pads - sizes range from .25" to .625" to lift and lower the helmet
• Includes removable gel earcups
• Compatible with all Simpson communication kits
• Front chin spoiler for stabillity in open cockpit cars
• No front ventilation to keep dirt and debris out
• Top and rear vents for ventilation
• Optional top and top left offset forced air for cooling and fog mitigation
• Optional rear spoiler for more stability
• Comes standard with anti-fog/anti-scratch shield and aluminum tear off posts compatible with 10209C, 10209CP, and 10209S

Simpson's, lightest and most aerodynamic helmet, the SD1 is a premium helmet at a reasonable price. The helmet is tailored towards open wheel dirt track racing with no front vents and a front chin spoiler.

• New, aerodynamic design - Simpson's lightest helmet
• SA2020 Certified
• Composite models are available in 9 colors, including new Gray, Yellow, and Copper
• Removable cheekpads - sizes range from .75" to 1.375" for a custom fit
• Removable Top pads - sizes range from .25" to .625" to lift and lower the helmet
• Includes removable gel earcups
• Compatible with all Simpson communication kits
• Front chin spoiler for stabillity in open cockpit cars
• No front ventilation to keep dirt and debris out
• Top and rear vents for ventilation
• Optional top and top left offset forced air for cooling and fog mitigation
• Optional rear spoiler for more stability
• Comes standard with anti-fog/anti-scratch shield and aluminum tear off posts compatible with 10209C, 10209CP, and 10209S