ANSI/ISEA Z89.1-2014 (R2019) Type I, Class E, G and C (Non-Vented)
ANSI/ISEA Z89.1-2014 (R2019) Type I, Class C (Vented) CSA Z94.1-2015 (R2024) Type I, Class E, G and C (Non-Vented)
CSA Z94.1-2015 (R2024) Type I, Class C (Vented)