)
flame retardant trousers
Comprehensive welding PPE and flame retardant garments for fabrication and welding industries.
Designing and manufacturing superior welding PPE clothing, including FR overalls, trousers and jackets, for fabrication, welding, and high-heat environments
leading suppliers of flame retardant trousers
Our flame-resistant trousers are built for comfort, protection, and performance in demanding fabrication, welding, and industrial environments—offering dependable defence against heat, sparks, and molten metal.
Manufactured in both male and female fits, and available in a range of leg lengths, these trousers are designed to support natural movement—whether walking, bending, or working at low levels. Elasticated waistbands, ergonomic shaping, and durable FR fabrics ensure all-day wearability, while practical features such as kneepad pockets, cargo pockets, and reinforced seams support active, hands-on tasks.
In addition to our stocked styles, we offer custom-made FR trousers tailored to your workforce’s environment, safety requirements, and branding—ensuring a solution that works in the real world.
Contact us today to find out how we can supply and tailor our flame retardant trousers and other welding PPE to suit your team.
accreditations
)
experts in custom made protection for the worlds largest organisations
With decades of experience and partnerships across global industries, we specialise in custom-made fr/welding garments designed around the real needs of large-scale workforces.
From fabric selection to fit, function, and branding, we work closely with organisations to deliver protective clothing that reflects their environments, challenges, and people—at scale, without compromise.
our range of stocked flame retardant trousers
Below is our range of flame retardant trousers, offering unparalleled durability, reliability, and comfort.
While we offer a stocked range for fast access, our expertise is in custom-made garment solutions—developed in collaboration with leading organisations to meet specific performance, branding, and wearer requirements at scale.
Read more about our welding protection on our main heat and flame retardant garments page, or discover our bespoke design service for completely custom-made welding PPE for your company.
Fr phoenix trouser
Features
- Hook and bar waist fastening
- Belt loops
- Metal zip fly front fastening
- Two side swing pocket
Fabric
- 100% Fr treated cotton
- 340gsm
Colours
- Navy
- EN ISO 11611:2015 Class 1 A1
- BS EN ISO 11612:2015 A1, B1, C1, F1
Fr zeus trouser
Features
- Hook and bar waist fastening
- Belt loops
- Metal zip fly front fastening
- Sewn-in front creases
- Two side swing pocket
Fabric
- 75% FR Cotton / 25% Polyester
- 365gsm
Colours
- Navy
- Royal Blue
- EN ISO 11611:2015 Class 1 A1
BS EN ISO 11612:2015 A1, B1, C1, F1
Speak to our team today about our stocked arc flash coveralls or to discuss your bespoke requirements.
end user
Discover how our fr welding range can protect and enhance comfort for your team. Get in touch to learn how to order from one of our trusted distribution partners.
distributor
Join our distributor network and offer your customers industry-leading flame retardant overalls. Access exclusive support, training, and marketing assets
Why choose alsico as your flame retardant trousers supplier?
At alsico, we supply more than flame retardant trousers. From overalls to jackets, and other environments, we're your dedicated partner in ensuring the safety, comfort, and quality of your workforce and products.
Here's why you should choose alsico as your next flame retardant trousers supplier:
nearly 100 years of experience
With nearly 100 years of manufacturing experience, alsico brings together extensive knowledge of flame-resistant clothing and a drive for continuous innovation. Our garments are designed for the realities of high-risk work—balancing protection, comfort, and long-term durability.
complete control over our supply chain
Because we operate our own production sites, we maintain complete control over the process—from material selection through to final garment construction. This allows us to deliver consistently high quality and respond flexibly to the unique needs of each customer.
factory accredited to Module D
Several of our global production units are Module D accredited under the EU PPE Regulation—providing independent assurance that our FR trousers are produced in line with strict safety and quality protocols.
one of the most flexible production units in the world
We work closely with large organisations to create custom-made FR trousers that reflect specific operational tasks, environments, and wearers. From different leg lengths and fits to added features and branding, we deliver high-performance PPE designed around you.
sustainable & ethical practices
We take sustainability and ethics seriously—from responsible sourcing and efficient production to fair labour practices across all sites. Choosing Alsico means partnering with a manufacturer committed to both safety and social responsibility.
)
speak to an expert
We understand that every workplace has unique safety needs. Our team of experts is here to help you find the perfect flame retardant workwear and welding PPE tailored to your specific requirements.
Whether you need advice on selecting the right flame retardant garments, conducting risk assessments, or understanding compliance standards, our knowledgeable professionals are ready to assist you.
Don't hesitate to reach out. Let us help you ensure your team is safe, comfortable, and well-protected.
frequently asked questions
Where appropriate, it’s best to wear FR (flame-resistant) base layers underneath FR trousers to support full-body protection in the event of an incident. If FR underlayers are not required, natural fibres like cotton are typically preferred over synthetic fabrics, which may melt. Always refer to your organisation’s PPE guidelines and risk assessments for specific requirements.
Depending on the work environment, FR trousers may need to meet several EN standards. The most common include:
- EN ISO 11612 – For protection against heat and flame
- EN ISO 11611 – For welding and related processes
- EN 1149 – For protection against electrostatic discharge (if needed)
- EN ISO 20471 – For high visibility (in specific environments)
Always consult the garment’s technical file to confirm compliance with the standards required for your operation.
FR trousers are commonly used in sectors where heat, flame, or molten metal exposure is a risk. This includes:
- Welding and metal fabrication
- Utilities and energy
- Oil, gas, and petrochemical
- Manufacturing and heavy industry
- Rail, construction, and infrastructure
Each organisation should assess PPE needs based on specific job functions and hazards.
The need for FR trousers should be identified through a formal risk assessment. If tasks involve potential exposure to heat, sparks, welding, or molten splash, flame-resistant clothing may be required as part of the appropriate control measures.
The terms are often used interchangeably, but “flame resistant (FR)” is the more accurate term. FR trousers are made from materials that resist ignition and are designed to self-extinguish once the heat source is removed. Always look for trousers that are certified to the appropriate EN standards for the task at hand.
There is no set timeframe—replacement depends on wear frequency, task intensity, and garment condition. Trousers should be regularly inspected, and replaced if damaged, heavily contaminated, or worn in a way that could affect performance. Follow your internal PPE replacement policy and manufacturer care instructions.
Yes. At alsico, we offer custom-made FR trousers tailored to specific operational requirements. This can include adjustments to fit, leg length, functional features like kneepad pockets or tool loops, and branded design elements—while ensuring the garment maintains full safety certification.
learn about our different solutions for wearer protection
electricity and arc flash
Our clothing, tailored to specific risk levels, offers significant protection, enhancing safety in industries where Arc Flash incidents are prevalent, minimising the risk of serious burns and injuries.
heat, flame, and welding
Burning hot embers, sparks and fire should never touch the skin of a human, our high-performance, FR and Welding protection garments are essential for workers in these environments.
visibility
Stay seen and secure with our high-visibility solutions, designed to keep workers visible and protected in environments such as railways, roads, docks, airports, and construction.
anti-static / ESD
Industries where electrostatic discharge poses a threat require anti-static/ESD garments. These specialized garments prevent static electricity buildup during sensitive operations, providing a crucial line of defense for worker safety.
molten metals
Protective solutions to ensure your team's safety from molten metal hazards, ensuring maximum-level protection against various metals, including zinc, nickel, and lead, ensuring your team's safety.
chemical
Chemical-resistant attire is necessary for protecting workers from hazardous substances in various industries. Alsico's reliable protective clothing creates a secure barrier against potentially harmful chemicals, prioritizing workplace safety.
rain and cold
Rain and cold weather workwear is pivotal in ensuring safety and comfort in challenging conditions, ensuring workers across diverse industries can perform their tasks safely and efficiently.
