Vented Safety Helmet with Koroyd | GE PPE

Essentials Features

Top benefits and standout attributes for this product.

ANSI Z89.1-2014 certified — Type 1, Class C impact protection for construction, utilities, oil & gas, forestry, and general industry
Koroyd® exclusive impact-absorbing liner — outperforms traditional EPS foam by 48% and prevents energy rebound onto the user
First and only safety helmet on the market to use Koroyd exclusively as its protective impact material
Durable ABS external shell — ultra-lightweight at just 422 g (0.93 lb) for all-day comfort
Wide operating temperature range: -30°C to 60°C (-22°F to 140°F) for year-round use in extreme environments
Cross ventilation system with 10 vents — air flows consistently through the helmet to expel heat and reduce heat stress
Low-profile design at 143.1 mm height — ideal for confined spaces and overhead work
Adjustable ratchet fit system (53–63 cm) — rubber wheel turns and moves up/down for a personalized, secure fit
Ergonomically shaped cradle wings support the back of the neck; wing position adjusts inward or outward for custom comfort
Antimicrobial wicking memory foam sweat-band padding — manages moisture and maximizes comfort during extended wear
4-point adjustable chin strap made from black polyester — side anchor points move up and down for precise positioning and stability
Chin strap meets ANSI Z89 fixed anchor requirements and EN12492 retained chin strap anchor requirements
4-point chin strap adapts to cap-mounted earmuff use for uninterrupted hearing protection compatibility
10 accessory slots (front, rear, and sides) — securely attach flashlights, eye shields, full face visors, earmuffs, ID holder, and more
3 cm cap-mounted earmuff fitting slots — compatible with GE cap-mounted protective earmuffs and other compatible models
Integrated 4-point goggle and headlamp clips — easy to install, secure elastic bands without extra hardware
Dedicated flashlight slot and ID holder slot built into the shell
Available in 8 colors: White (GH400W), Blue (GH400B), Black (GH400BK), Gray (GH400G), Green (GH400GN), Orange (GH400O), Red (GH400R), Yellow (GH400Y)
3-year warranty for long-term reliability on the job site
Class C (Conductive) — not rated for electrical hazard protection; for Class E electrical protection choose the GH401 non-vented model

Overview Product Description

The GE PPE GH400 Vented Safety Helmet is a Type 1, Class C hard hat certified to ANSI Z89.1-2014, engineered for workers who need all-day impact protection without sacrificing breathability or comfort. Its defining advantage is the exclusive use of Koroyd® impact-absorbing technology — the GH400 is the first and only safety helmet on the market to rely solely on Koroyd as its protective liner, outperforming traditional EPS foam by 48% while preventing energy rebound onto the wearer. Important: this is a Class C (Conductive) helmet — it does not provide electrical hazard protection. For environments with electrical exposure, see our GH401 Non-Vented Safety Helmet (Class E).

Why it stands out

Koroyd® liner, not EPS foam: absorbs impact energy 48% more effectively than conventional foam and eliminates energy rebound onto the user — a first in the safety helmet market.
Cross ventilation system with 10 vents: air flows consistently through the helmet, channeling heat away from the head and reducing heat stress during sustained outdoor or high-temperature work.
360° adjustable ratchet fit system: a rubber-wheel dial moves up, down, and around to dial in an exact fit across head sizes 53–63 cm; ergonomic cradle wings support the back of the neck and can be moved inward or outward.
4-point adjustable chin strap: black polyester construction with side adjustment points; fixed anchor meets ANSI Z89 and EN12492 retained chin strap anchor requirements; compatible with cap-mounted earmuffs.
Antimicrobial wicking memory foam sweat-band: manages moisture and maintains comfort during full-shift wear at only 422 g (0.93 lb).
10 accessory slots + integrated 4-point clips: front, rear, and side slots accommodate flashlights, eye shields, full face visors, cap-mounted earmuffs (3 cm slots), ID holder, goggles, and headlamps — no separate adapters needed.

Who it's for

Construction workers on active job sites requiring ANSI-rated impact protection and all-day wearability.
Oil & gas and utilities workers in hot or outdoor environments where ventilation and heat management directly affect productivity and safety.
Forestry and landscaping professionals who routinely attach face shields, goggles, earmuffs, or headlamps and need a helmet built for accessory integration.
Manufacturing and warehousing personnel needing a lightweight, low-profile helmet for overhead or confined-space tasks.
Mining and general industry workers operating across a wide temperature range (-30°C to 60°C) who need a single helmet that performs in both cold and hot conditions.
Not for live electrical work: Class C provides no electrical hazard protection — for Class E (20,000V proof-tested) coverage, choose the GH401.

Available colors & SKUs

Black — GH400BK
Blue — GH400B
Gray — GH400G
Green — GH400GN
Orange — GH400O
Red — GH400R
White — GH400W
Yellow — GH400Y

Tech sheet Specifications

Check the key technical data to validate compatibility and performance.

Model	GH400
Series	Vented
Helmet Style	Type 1
ANSI Class	Class C (Conductive)
Certification	ANSI Z89.1-2014
Electrical Protection	None — Class C (Conductive); does not provide electrical hazard protection
Shell Material	ABS
Impact Absorbing Material	Koroyd Technology
Koroyd vs EPS Foam Performance	Outperforms EPS foam by 48%; prevents energy rebound
Ventilation Type	Cross Ventilation System
Number of Vents	10
Height Profile	143.1 mm
Helmet Weight	422 g / 0.93 lb
Head Size Range	53–63 cm
Temperature Range	-30°C to 60°C / -22°F to 140°F
Suspension System	Adjustable Ratchet System with rubber wheel; adjusts up, down, and 360°
Chin Strap	4-Point Adjustable, Black Polyester
Chin Strap Anchor Type	Fixed Anchor (ANSI Z89); meets EN12492 retained chin strap anchor requirements
Internal Padding	Antimicrobial Wicking Memory Foam Sweat-Band
Number of Accessory Slots	10
Accessory Slot Compatibility	Flashlight, protective eye shield, full face visor, cap-mounted earmuffs, ID holder, goggles, headlamps
Earmuff Fitting Slot Size	3 cm
Integrated Clips Coverage	4-point
Warranty	3 Years
Country of Origin	China
Koroyd Origin	Germany
Available Colors	Black (GH400BK), Blue (GH400B), Gray (GH400G), Green (GH400GN), Orange (GH400O), Red (GH400R), White (GH400W), Yellow (GH400Y)
Packaging Unit	Blister / Box
Case Quantity	10 pieces
Case Weight	8.5 kg / 18.7 lb
Case Dimensions	18" x 12.4" x 26" / 45.72 x 31.4 x 66 cm
Brand	GE PPE
Licensed By	Caco Abbo Internacional, S.A.

Resources Documentation & downloads

Manuals, sheets, and helpful files ready to download.

Overview About the product

The Future of the 
Safety Helmet has Arrived.

Our award winning safety helmet, the GH400, features Koroyd’s advanced impact absorbing technology as the inside protective layer between the ABS shell of the helmet and the head of the user. In comparison with the rest of the safety helmets on the market today, the GH400 is the only one that uses Koroyd's patented technology, as the solely protective material, instead of the traditional EPS foam most of the rest of the helmets use.

Additional details Why have we chosen Koroyd over traditional EPS foam?

Because when EPS foam is compressed during an impact, it becomes stiffer, resulting in more energy being transferred from the impact to the head of the user. The Koroyd material used in the GH400, as shown in the video, crumples consistently during the impact. This advantage reduces the energy from an impact transferred to the user, and consequently protects the user better.

Our mission is to deliver a helmet that offers better protection without compromising user comfort. A helmet so lightweight and compact it's easy to forget it's on, reducing short-term removal and the risk of injury, while improving performance.

The engineered structure of the Koroyd material has many benefits. The most important one is the ability to absorb the energy of any impact at a constant rate, decreasing the chances of injury for the user. Koroyd outperforms EPS foam by 48%, featuring advanced impact technology.

Another vital benefit is minimal heat accumulation. The structure of the Koroyd material is composed by the world’s thinnest walled tubes. This enables heat from the user’s head to vent out of the helmet easily. Helped by the cross ventilation system, the GH400 prevents heat stress in most conditions.

Featuring the world’s thinnest walled tubes, Koroyd`s structure is 95% air, providing reduced weight and enhanced comfort without compromising on safety.

FAQ What ANSI certification does the GH400 helmet have?

The GH400 is certified to ANSI Z89.1-2014, Type 1, Class C. This means it meets impact protection standards but is Class C (Conductive) — it does not provide electrical hazard protection. If you need electrical protection, we recommend our GH401 (non-vented, Class E), which is proof tested at 20,000 volts.

FAQ Can I use this helmet for electrical work?

No — the GH400 is a Class C (Conductive) helmet and does not provide electrical hazard protection. For environments with electrical hazard exposure, we carry the GH401, which meets Class E standards and is proof tested at 20,000 volts. Feel free to reach out to us at sales@cacoamerica.com if you need guidance choosing the right model.

FAQ What makes the Koroyd impact material better than standard EPS foam?

The GH400 is the first and only safety helmet on the market to use Koroyd exclusively as its impact-absorbing material. Koroyd outperforms traditional EPS foam by 48% and prevents energy rebound from the impact back onto the user, providing superior head protection without adding extra weight.

FAQ What head sizes does the GH400 fit?

FAQ How much does the GH400 weigh?

FAQ What colors is the GH400 available in?

FAQ What is the difference between the GH400 (vented) and the GH401 (non-vented)?

The GH400 is a vented helmet with 10 vents and a cross ventilation system — ideal for hot environments where heat management is a priority. It is ANSI Class C (no electrical protection). The GH401 is non-vented and meets ANSI Class E standards, proof tested at 20,000 volts, making it the right choice for electrical work. Both share the same Koroyd impact technology, ABS shell, and accessory-compatible slot system.

FAQ How does the ventilation system work?

FAQ What accessories can I attach to this helmet?

The GH400 has 10 accessory slots positioned at the front, rear, and sides. These accommodate flashlights, protective eye shields, full face visors, cap-mounted earmuffs, an ID holder, and more. It also includes 3 cm cap-mounted earmuff fitting slots compatible with GE cap-mounted earmuffs and other compatible models, plus integrated 4-point clips to secure elastic bands for goggles and headlamps.

FAQ Is the chin strap included, and can it be adjusted?

Yes, the GH400 includes a 4-point adjustable chin strap made from black polyester. The side adjustment points move up and down so you can position it for an ideal, secure fit. It is designed to be compatible with cap-mounted earmuff use and meets Fixed Anchor requirements per ANSI Z89 and retained chin strap anchor requirements per EN12492.

FAQ What temperature range can this helmet be used in?

FAQ What is the helmet's height profile?

FAQ What is the warranty on the GH400?

FAQ What industries and job types is the GH400 designed for?

The GH400 is purpose-built for workers in construction, oil & gas, utilities, forestry, manufacturing, and general industry who need ANSI-rated impact protection with all-day comfort and ventilation. It is especially well suited for outdoor or warm environments where heat management is important.

FAQ What is the shell made of, and where is the helmet manufactured?

FAQ How many helmets come in a case, and what are the case dimensions?

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Sales Advisor

Vented Koroyd Safety Helmet, Class C — GE PPE GH400, ANSI Z89.1-2014 Type 1

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Why it stands out

Who it's for

Available colors & SKUs

The Future of the 
Safety Helmet has Arrived.

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