Portwest FR433 PW3 Modaflame Hi-Vis Class 1 FR Jogger | ATEX

The Portwest FR433 PW3 Modaflame Hi-Vis Class 1 FR Jogger combines multi-hazard protection with the comfort and flexibility of athletic-style workwear. This innovative garment brings together inherent flame resistance, anti-static properties, arc flash protection, and high visibility in a comfortable jogger design that moves with the wearer throughout demanding work shifts.

Constructed from premium Modaflame Knit fabric (60% Modacrylic, 39% Cotton, 1% Carbon Fibre at approximately 300g/m²), this jogger delivers permanent protection that never washes out or diminishes over the garment's lifetime. The modacrylic fibres provide inherent flame resistance—they self-extinguish when removed from a flame source—while the cotton content ensures breathability and comfort. The carbon fibre element provides the anti-static dissipative properties essential for ATEX zone compliance.

Certified to EN ISO 11612 for heat and flame protection, EN 1149-5 for anti-static properties, and IEC 61482-2 for arc flash resistance, this jogger meets the demanding requirements of utilities, petrochemical, and industrial environments. The EN ISO 20471 Class 1 high visibility certification ensures lower body visibility in low-light conditions, complementing Class 3 upper body garments for comprehensive coverage.

The jogger design features a comfortable ribbed waistband with elasticated construction for unrestricted movement, elasticated hems for a secure fit, and multiple pockets for secure storage of essential tools and personal items. Flame resistant reflective tape provides visibility while maintaining the garment's protective integrity. With 40+ UPF rated fabric blocking 98% of UV rays, outdoor workers gain additional sun protection.

CE-CAT III certified and ATEX environment approved, the FR433 represents the future of FR workwear—garments that protect without compromising on comfort or style.

The Portwest FR433 PW3 Modaflame Hi-Vis FR Jogger delivers multi-norm protection in a comfortable athletic design. Constructed from inherent Modaflame Knit fabric (60% Modacrylic/39% Cotton/1% Carbon Fibre), this jogger provides permanent flame resistance, anti-static properties, and arc flash protection that never washes out. Features include ribbed elasticated waistband, secure pockets, FR reflective tape, and elasticated hems. Certified to EN ISO 11612, EN 1149-5, IEC 61482-2, and EN ISO 20471 Class 1. ATEX environment approved. 40+ UPF UV protection. Ideal for utilities, petrochemical, and industrial applications requiring lower body FR protection.

1. Inherent Modaflame Knit fabric—60% Modacrylic, 39% Cotton, 1% Carbon Fibre
2. Permanent flame resistance that never washes out or diminishes
3. EN ISO 11612 certified heat and flame protection (A1, B1, C1, F1)
4. EN 1149-5 anti-static dissipative properties for ATEX environments
5. IEC 61482-2 arc flash protection certified
6. EN ISO 20471 Class 1 high visibility certification
7. ATEX environment approved for explosive atmospheres
8. Comfortable jogger-style design with athletic fit
9. Ribbed elasticated waistband for unrestricted movement
10. Elasticated hems for secure, comfortable fit
11. Multiple pockets for secure tool and personal item storage
12. Flame resistant reflective tape for visibility without compromising protection
13. High cotton content (39%) for superior breathability and comfort
14. 40+ UPF rated fabric blocks 98% of UV rays
15. Protection against radiant, convective, and contact heat
16. CE-CAT III certified for high-risk PPE
17. Available in Yellow/Black and Orange/Black
18. Size range S-3XL

TECHNICAL SPECIFICATIONS

Q1: What makes the FR433 different from standard FR trousers?

A: The FR433 combines jogger-style comfort with full multi-norm FR protection. Unlike traditional work trousers, it features a ribbed elasticated waistband and elasticated hems for athletic-style fit and unrestricted movement. The inherent Modaflame Knit fabric provides permanent flame resistance, anti-static properties, and arc flash protection without the stiffness associated with treated FR fabrics. This makes it ideal for workers who need protection but also value comfort during long shifts.

Q2: What does "inherent flame resistance" mean?

A: Inherent flame resistance means the protective properties are built into the fibre itself, not applied as a chemical treatment. The FR433's Modaflame Knit fabric uses modacrylic fibres that are naturally flame resistant at the molecular level. This means the protection never washes out, fades, or diminishes over the garment's lifetime—providing consistent safety performance from first wear to last, regardless of how many times it's laundered.

Q3: Is the FR433 suitable for ATEX zones?

A: Yes, the FR433 is ATEX environment approved. The 1% carbon fibre content in the Modaflame Knit fabric provides anti-static dissipative properties certified to EN 1149-5, preventing dangerous static electricity buildup in potentially explosive atmospheres. This makes it suitable for petrochemical refineries, gas installations, fuel handling areas, and other Zone 1 and Zone 2 classified environments where static discharge could ignite flammable atmospheres.

Q4: What arc flash protection does this jogger provide?

A: The FR433 is certified to IEC 61482-2 with IEC 61482-1-2 Class 1 arc flash protection (Box Test method). This provides protection against secondary electric arc hazards in electrical work environments. For complete arc flash protection, the FR433 should be paired with appropriately rated FR upper body garments to achieve the total system ATPV (Arc Thermal Performance Value) required by your workplace risk assessment.

Q5: Why is this a Class 1 hi-vis garment?

A: EN ISO 20471 Class 1 is the standard classification for lower body hi-vis garments (trousers, shorts, joggers) due to the reduced surface area available for fluorescent background material and reflective tape compared to jackets and coveralls. Class 1 provides enhanced visibility for the lower body and is designed to complement Class 2 or Class 3 upper body garments to achieve overall visibility coverage. When worn with a Class 3 jacket, the combination provides comprehensive head-to-toe visibility.

Q6: Can this jogger be worn as standalone FR protection?

A: The FR433 provides complete lower body FR protection and can be worn as standalone FR trousers when the risk assessment permits. For full body protection, layer with compatible Modaflame upper body garments such as the FR72 Hi-Vis Sweatshirt, FR31 Fleece, or FR81 Hoodie. All layers in contact with skin should be FR-rated when arc flash or flame exposure is possible—never combine FR garments with non-FR underwear or base layers in these environments.

Q7: How does the jogger design affect protection levels?

A: The jogger design does not compromise protection—the FR433 achieves the same EN ISO 11612, EN 1149-5, and IEC 61482-2 certifications as traditional Modaflame trousers. The elasticated waistband and hems actually provide benefits by ensuring a snug fit that minimises gaps where heat or flames could penetrate. The athletic styling simply offers enhanced comfort and modern aesthetics without sacrificing safety performance.

Q8: What temperatures and heat exposures does EN ISO 11612 A1, B1, C1, F1 cover?

A: These codes indicate the specific heat protection tests passed:

• A1: Limited flame spread (surface ignition) - fabric self-extinguishes
• B1: Convective heat protection - 4-10 seconds before 24°C temperature rise
• C1: Radiant heat protection - 7-20 seconds before 24°C temperature rise
• F1: Contact heat protection - 5-10 seconds at 250°C before 24°C temperature rise

These ratings confirm protection against brief exposures to flames, hot air, radiant heat sources, and contact with hot surfaces.

MODAFLAME TECHNOLOGY EXPLAINED

About Modaflame Fabric

Modaflame is Portwest's premium inherent flame resistant fabric technology, engineered for environments where workers face multiple hazards simultaneously. Unlike treated FR fabrics where protection is applied chemically and can diminish over time, Modaflame's protection is inherent—built into the fibre structure itself.

Modaflame Knit Composition

The FR433 uses Modaflame Knit fabric with the following composition:

Key Properties

Permanent Protection: The modacrylic fibres are inherently flame resistant at the molecular level. They char and self-extinguish when exposed to flame, forming a protective barrier. This protection never washes out or degrades.

Comfort Without Compromise: The 39% cotton content ensures the fabric remains breathable and comfortable against the skin, unlike some synthetic FR fabrics that can feel hot or clammy.

Static Dissipation: The carbon fibre component creates a conductive pathway that dissipates static electricity, preventing dangerous charge buildup in explosive atmospheres.

Multi-Norm Certification: Single fabric achieves multiple safety certifications, eliminating the need for layered or treated garments to meet workplace requirements.

Why Modaflame Knit for Joggers?

The knit construction of Modaflame Knit provides natural stretch and flexibility ideally suited to the jogger format. Unlike woven FR fabrics that can restrict movement, the knit structure allows the fabric to move with the body while maintaining protective coverage. This makes Modaflame Knit perfect for active work environments where mobility is essential.

EN ISO 11612 - Heat and Flame Protection

The FR433 achieves EN ISO 11612 certification with the following performance codes:

EN 1149-5 - Anti-Static Properties

This standard certifies the garment's ability to dissipate electrostatic charge, essential for:

• Petrochemical and refinery environments
• Gas and fuel handling areas
• Explosive atmosphere (ATEX) zones
• Environments with flammable dusts or vapours

The carbon fibre content creates a conductive network that safely dissipates static charges to prevent spark generation.

IEC 61482-2 - Arc Flash Protection

The FR433 is certified to IEC 61482-2 with IEC 61482-1-2 Class 1 (Box Test method), providing protection against:

• Secondary arc flash hazards
• Electric arc thermal effects
• Brief arc flash exposures in electrical environments

Important: Arc flash PPE systems should be selected based on incident energy calculations from an arc flash risk assessment. The FR433 provides lower body protection within a complete FR layering system.

EN ISO 20471 Class 1 - High Visibility

Class 1 is the appropriate hi-vis classification for lower body garments:

• Provides enhanced visibility for legs and lower body
• Designed to complement Class 2/3 upper body garments
• Suitable when combined with hi-vis jacket for full coverage
• Appropriate for environments with moderate vehicle traffic risk

FR JOGGER vs FR WORK TROUSERS COMPARISON

When to Choose the FR Jogger

Choose FR433 FR Jogger when:

• Maximum comfort and mobility are priorities
• Working in roles requiring frequent movement (walking, climbing, crouching)
• Kneepad pockets and holster pockets are not required
• Modern, athletic aesthetic is preferred
• Layering over FR base layer leggings

Choose FR Holster Trousers (FR416) when:

• Carrying multiple tools requiring holster pockets
• Kneepad protection is essential
• Maximum pocket capacity needed
• Traditional work trouser fit preferred

FR Layering System with FR433

Base Layer (Next to Skin):

• FR14 Modaflame Knit Leggings (for additional warmth/protection)
• FR11 Modaflame Long Sleeve T-Shirt (upper body)

Mid Layer:

• FR433 Modaflame FR Jogger (lower body)
• FR72 Modaflame Hi-Vis FR Sweatshirt (upper body, Class 3)
• OR FR81 Modaflame FR Hoodie (upper body)
• OR FR31 Modaflame Hi-Vis FR Fleece (upper body, Class 3)

Outer Layer (Cold/Wet Weather):

• MV72 Modaflame Multi-Norm Arc FR Softshell Jacket
• OR FR606 PW3 Modaflame Multi-Norm Winter Jacket

Complete Visibility Coverage

For maximum hi-vis protection combining the FR433 (Class 1) with appropriate upper body garments:

Critical FR Layering Rule

All layers in contact with skin must be FR-rated when arc flash or flame exposure is possible. Never include non-FR underwear, T-shirts, or base layers beneath FR garments—in a thermal event, non-FR fabrics can melt and cause severe burns.