Portwest S781 Orange Bizflame Rain Lined High-Vis Flame Resistant Trousers

  • Warm, waterproof and breathable anti-static trousers
  • Ideal for physically strenuous work in cold and wet conditions
  • Elasticated braces for secure fit while bending or stretching
  • Flame resistant and chemical resistant properties
Our Price:  £49.95
Excl. VAT. (£59.94 Inc. 20% VAT)

Portwest S781 Orange Bizflame Rain Lined High-Vis Flame Resistant Trousers

The Portwest S781 Orange Bizflame Rain Lined High-Vis Flame Resistant Trousers are a secure, warm fit, allowing for full freedom of movement while still insulating you from cold and wet conditions. The trousers are certified as highly visible, as well as qualifying for a range of industrial safety standards.

What Can the Orange Bizflame Rain Lined High-Vis Flame Resistant Trousers Do for Me?

The trousers have numerous helpful features, including the following:

  • Waterproof: Taped seams and waterproof fabric prevents water penetration, breathable material draws moisture away from the body
  • Warm: FR cotton lining and raised back for warmth in cold conditions
  • High-Vis: Reflective tape for increased visibility, certified as suitable for railway work
  • Multi-Hazard: Protection against light chemical sprays and brief contact with small igniting flames, inherent anti-static properties
  • Functional: Elasticated, adjustable braces for secure fit while bending and stretching, ergonomic quick release buckles and zipped ankles for easy access

Are the Trousers Available in Any Other Colours?

Yes, the trousers are also available in Yellow.

Who Can Use the Bizflame Rain Lined Trousers?

The Portwest trousers allow for full freedom of movement, the elasticated braces easily keeping them in place. They are ideal for high-risk work in cold and wet conditions, with a variety of features to keep you warm and dry and protected from various hazards. Some of the professions and environments for which the trousers are suited follow here:

  • Road work
  • Maintenance
  • Utilities
  • Construction
  • Surveyors
  • Railway work

Which Size Is Right for Me?

To establish the correct size for you please measure the circumference of your waist as illustrated in the diagram. Then, with reference to the table below, select the right option from the drop down menu at the top of the page.

Waist Measurement

Size Waist Measurement (cm)
Medium 81 - 88cm
Large 89 - 96cm
Extra Large 97 - 104cm
XX-Large 105 - 112cm
XXX-Large 113 - 120cm

What Certifications Have the High-Vis Flame Resistant Trousers Received?

The Portwest trousers have undergone extensive testing, so you can be certain of your safety at work. Certifications include:

  • RIS-3279-TOM Issue 1
  • EN 343
    • Class 3:3
  • EN ISO 14116:
    • Index 1
  • EN 20471:
    • Class 1
  • EN 13034:
    • Type 6
  • EN 1149:
    • 5: Protects against electrostatic discharge in case of an explosion

What Do These Certifications Mean?

  • EN 1149: This standard demonstrates whether a garment protects against electrostatic discharge in environments such as petrochemical refineries where there is a risk of explosion
  • EN ISO 20471: This standard certifies whether an item of clothing is capable of visually signalling the user's presence, and assesses the durability of the high-vis qualities of the garment
  • EN 13034: This standard refers to a garment's ability to protect against spatters from dangerous liquid chemicals
  • EN ISO 14116: This standard specifies whether a garment will protect the wearer from occasional and brief contact with small igniting flames
  • EN 343: This standard outlines the garment's level of protection against wet weather, the first class number referring to water resistance, the second referring to breathability
  • RIS-3279-TOM: This standard determines whether a garment qualifies as suitably high-vis for working in the rail industry

The trousers have achieved the highest possible rating for breathability and waterproofing under EN 343. They are resistant to light chemical sprays and small igniting flames, and feature inherent anti-static properties due to the carbon fibre element in their construction. The trousers are certified as high-vis, and qualify for use in the railway industry.

Is Further Information Available on These Certifications?

If you would like to find out more about the standards mentioned here please read one of our blogs on the subject. Please see the links below:

Key Features of the Lined Flame Resistant Trousers

  • FR waterproof fabric with taped seams to prevent water penetration
  • Flame resistant reflective tape for increased visibility
  • Breathable fabric to draw moisture away from the body and keep the wearer comfortable
  • FR cotton lining for added warmth
  • Adjustable straps for a secure fit
  • Zipped ankles for easy fitting over work boots
  • Fully elasticated waistband for maximum wearer comfort
  • Ergonomic quick release buckle for easy access
  • OEKO-Tex certified as free from harmful chemicals

Washing Instructions for the Portwest Trousers

  • Wash at 40°C or below
  • Do not bleach
  • Do not tumble dry
  • Do not iron
  • Do not dry clean
  • Use non-biological powder
  • Do not use softener

Technical Details of the Portwest Trousers

  • Shell Fabric: 98% Polyester, 2% Anti-static Carbon Fibre, Breathable, PU Coated 250g
  • Lining Fabric: 100% Cotton Flame Resistant Lining 170g


Conformity Statement User Instructions 1 User Instructions 2 User Instructions 3
Declaration of Conformity User Instructions User Instructions User Instructions

Be the first to Write a Review for this item!


This item will be dispatched by 1st Class Royal Mail, DPD courier or UPS courier.

The estimated delivery time for this item is usually 1-3 working days after dispatch when ordered before 14:00, Monday to Friday (excluding Bank Holidays).

Please contact our Customer Care Team on 020 7501 0598 for an up to the minute delivery expectation for this product.

UK Delivery Charges

Certain orders delivered to the UK are subject to a delivery charge; refer to the table below for more information. Please note that all values are listed exclusive of VAT.

Order Value UK Delivery Charge
Up to £39.99 £4.95
£40.00 and over FREE

Coronavirus Update

Please note that, due to the current COVID-19 pandemic, our processing time may increase slightly. We would advise that orders may be set back by as much as five working days, though we are striving to keep our delivery schedule as close to normal as possible.

If you have been waiting over 7 working days for your order and would like an update, please contact our Customer Care team at helpdesk@workwear.co.uk.