Type I vs Type II Hard Hat: Key Differences Explained

ANSI/ISEA Z89.1 defines two hard hat types based on the direction of impact protection. Understanding Type I vs Type II determines whether a traditional hard hat or a modern safety helmet is required for your site.

Type I vs Type II: The Critical Difference

Which Type Do You Need?

If your employer or site PPE policy mandates Type II — you need Type II. No substitution is permitted. If your site requires OSHA minimum compliance (ANSI Z89.1) without specifying Type — a Type I hard hat meets the requirement.

As of 2026, Type II is increasingly mandated on commercial construction, institutional, and infrastructure projects. Industrial facilities (manufacturing, utilities) still predominantly use Type I. Check your specific site policy before purchasing.

Type II Product Recommendations

Milwaukee BOLT Full Brim — Type II, Class E, polycarbonate, 6-pt ratchet. Read review →

VIEW ON WC SAFETY → VIEW ON AMAZON →

STUDSON SHK-1 Non-Vented — Type II, Class E, ABS polymer. Read review →

VIEW ON WC SAFETY →

Type I Product Recommendations

MSA V-Gard Cap Style — Type I, Class E, the best-selling hard hat in the US. Read review →

VIEW ON WC SAFETY →

Frequently Asked Questions

What is the difference between a Type I and Type II hard hat?

ANSI/ISEA Z89.1 Type I hard hats protect from impacts to the top of the head only. Type II hard hats protect from impacts to both the top AND lateral (sides) of the head. Type II is the higher protection standard. See best Type II safety helmets for Type II picks.

Do I need a Type I or Type II hard hat?

It depends on your jobsite requirements and employer PPE policy. OSHA 29 CFR 1926.100 does not mandate Type II — it requires ANSI Z89.1 compliance (which Type I meets). However, many construction project owners now mandate Type II. If your site requires Type II, choose a safety helmet-style hard hat. If not, a Type I hard hat meets OSHA requirements.

Does Type II cost more than Type I?

Yes — Type II safety helmets (Milwaukee BOLT, STUDSON SHK-1, MSA V-Gard H2) typically cost more than equivalent Type I hard hats. Type II shells require more complex construction to pass both top and lateral impact tests. The premium is typically $30–80 over a comparable Type I hard hat.

Can a Type I hard hat be used where Type II is mandated?

No. If your jobsite mandates Type II, a Type I hard hat does not comply regardless of its Class E rating or other features. You must use a Type II certified hard hat. Check your specific site PPE policy.

Are all safety helmets Type II?

No — but most modern safety helmets (dome-profile hard hats) are Type II. Traditional flat-top hard hats are usually Type I. Some dome-profile helmets may still be Type I. Always verify the ANSI type certification on the specific product, not the shell shape alone.

What is the lateral impact test for Type II?

ANSI/ISEA Z89.1 Type II testing includes an off-center (oblique) drop test that creates lateral impact on the side of the head, in addition to the vertical drop test used for Type I. The hard hat must transmit less than the maximum force to the test headform in both test positions. Type I hard hats are only tested with the vertical drop.

Do Type II hard hats provide better protection in all situations?

Type II provides additional protection against lateral impacts — but this protection is only meaningful if lateral impact is a realistic hazard at your site. For indoor manufacturing where falling objects are the primary hazard, the lateral impact protection of Type II is rarely triggered. For construction environments with swinging objects, formwork, and equipment at head height, Type II provides meaningful additional protection.

What are the most popular Type II hard hats?

The most popular Type II hard hats are the Milwaukee BOLT, STUDSON SHK-1, and MSA V-Gard H2. See best safety helmets guide for full reviews.

Does Type I or Type II matter more than the Class rating (E, G, C)?

Both matter for different hazards. The Class rating addresses electrical protection — Class E (20kV) is required for electrical trade regardless of Type. The Type rating addresses impact protection — Type II is required where lateral impacts are mandated. You must meet both the required Type AND Class for your specific environment.

Are Type II hard hats approved by OSHA?

Yes — OSHA 29 CFR 1926.100 accepts any ANSI Z89.1 certified hard hat (Type I or Type II). Type II is compliant with OSHA. It exceeds OSHA's minimum standard.

Can I wear a Type II hard hat if my site only requires Type I?

Yes — a Type II hard hat meets and exceeds the Type I requirement. There is no downside to wearing Type II on a site that only requires Type I. You get additional lateral impact protection at the cost of a higher purchase price.

What does a Type I hard hat look like vs a Type II?

Traditional flat-top hard hats with a visor and flat crown are almost always Type I. Modern dome-profile safety helmets (resembling a climbing or bicycle helmet) are typically Type II. However, shape alone is not a reliable indicator — always check the ANSI Z89.1 certification label inside the hat.