Mongoose REACT E4 Owner's Manual page 6

Helmet Use
Important! Many states have passed helmet laws regarding
children. Make sure you know your states helmet laws. It is your
job to enforce these rules with your children. Even if your state
does not have a children's helmet law, it is recommended that
everyone wear a properly fitted helmet that complies with ASTM
or SNELL helmet standards.
The correct helmet should: Figure 1.2
• Be comfortable
• Have good ventilation
• Fit correctly
• Cover forehead
Incorrect helmet position: Figure 1.3
• Helmet does not cover the forehead
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Figure 1.2
Figure 1.3