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    Workmaster™ boots are manufactured at our automated state of the art footwear factory TO THE VERY HIGHEST TECHNICAL STANDARDS IN THE WORLD.

    Boot Construction

    How are they made?

    Workmaster™ boots are manufactured at our automated state of the art footwear factory based in Crawley (in the United Kingdom). The injection moulding manufacturing process guarantees a seamless leak-free construction. This modern high-volume production facility enables the manufacture of different types and styles of boots within the same operating run, giving the flexibility to meet rapidly changing market demands.

    All our boots are REACH compliant and both boots and insoles are machine washable at up to 40°C with a shelf life in excess of 10 years.

    Boot Features

    1. Slip-resistant vulcanised rubber sole
    2. Steel toe cap
    3. Stainless steel mid-sole
    4. Comfort insole
    5. Cushioned heel
    6. Kick-off lug
    7. Adjustable height
    8. Single piece injection moulded construction
    9. Non-wicking polyester lining Not all features are present on all boots - please check the product page for the specific boot you are interested in.

    Antistatic & ESD Footwear

    According to EN 20345: 2011, a shoe or boot is considered to be antistatic if its’ measured electrical contact resistance falls between 100 kΩ (105 ohms) and 1 GΩ (109 ohms). With a lower resistance, a shoe or boot is considered to be conductive and at higher values, to be insulating. This 100kΩ to 1GΩ range is regarded a sensible compromise, giving protection from electrostatic build up and protection from electrical shocks at lower voltages.


    For some industries the risk of uncontrolled electrical discharge (sparks) in potentially explosive atmospheres or the protection of sensitive electronic components and devices are also important considerations. In these situations, another standard for Electro-Static Discharge (ESD) control applies: EN 61340-5-1 (“Electrostatics. Protection of electronic devices against electrostatic phenomena”). 


    For ESD footwear the lower limit of electrical resistance is 100 kΩ (the same as for antistatic footwear) and the upper limit is 35 MΩ (3.5 x 107 ohms). This means that a boot that is ESD-capable is by definition also antistatic at the same time. Conversely, not every antistatic boot is ESD-capable e.g. If an electrical resistivity of 100 MΩ is measured, the shoe is antistatic but outside the ESD limits. If the shoe has an electrical resistance of only 1 MΩ, it is both antistatic and ESD-capable.

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    Benefits of a Vulcanised Rubber Sole

    Over 30% of industrial accidents result from slips, trips and falls - as Workmaster™ boots are frequently used in environments where there are liquids present a slip resistant sole is crucial, which is why we fit a high-performance vulcanised rubber sole to our boots.

    This provides a number of important benefits:      

    • Slip resistance is twice that required by EN 13287 SRA and SATRA TM144 standards      
    • Grip is 30% better than with a conventional safety boot sole      
    • Wear resistance is two to three times that of conventional soles      
    • The sole is resistant to fuel and oil      
    • Greater cut resistance than conventional soles      
    • Resistant to hot contact for 60 seconds at 300°C      
    • Cold insulation

    The Science of slip

    There are two slip resistance tests specified in EN ISO 20345:2011 (with the method described in EN13287); the first is soapy water (Sodium Lauryl Suphate solution) on a ceramic tile. If the footwear passes this test then the boot can be marked SRA. The second is oil (Glycerol) on a steel plate, if the boot passes this test then it can be marked SRB. If a boot passes both the SRA and SRB test then it can be marked SRC.

    There is a common misunderstanding that SRC is the best for slip resistance - this is not the case!  Since the introduction of slip testing, accidents caused by slips have not reduced; this is because to pass the slip requirements on oily steel manufacturers have to sacrifice some slip performance in water, but most slip accidents occur where water is the contaminant (over 95%).

    The Workmaster™ vulcanised rubber sole produces very high levels of slip resistance with soapy water on a ceramic tile, and these test results have been confirmed during customer wear tests. Due to the performance characteristics of the sole material, boots with our vulcanised rubber sole also achieve a pass on the SRB (oil on steel test), without compromising SRA performance and are marked SRC


    Boot Compounds

    We have six compound families we use in our Workmaster™ boots that enable us to provide solutions for a wide range of industries and applications:

    Hazmax™ Widely used and highly effective chemical protection

    Dielectric Protection for high voltage workers

    Cryotuff Extremely durable providing protection against oils, common cleaning agents and solvents

    Cryolite Lightweight and environmentally friendly with excellent low temperature performance

    ISOTEC Heat and flame resistant

    Solestar A cost effective PVC based compound for general purpose footwear


    For hazardous or aggressive chemicals our Hazmax™ range of boots offer unrivaled chemical protection. Hazmax™ safety boots are widely used by emergency responders and people working with or transporting aggressive or other hazardous chemicals. Hazmax™ boots and overboots are certified to EN13832-3, the European standard for chemical protective footwear and meet the requirements of NFPA 1991 for chemical vapour protection.

    Find out more

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    Protective Footwear Standards


    EN 13832-3:2006

    Footwear protecting against chemicals. Requirements for footwear highly resistant to chemicals.

    EN 50321:2018

    Live Working - Footwear For Electrical Protection - Insulating Footwear And Overboots. Defines the requirements and testing for PPE footwear used as electrical insulating footwear and overboots used for working live or close to live parts on installations up to 36,000V AC, and DC requirements. This replaces EN 50321:1999.

    ASTM F1117-03 (2013)

    Specification for Dielectric Footwear. Covers acceptance testing of dielectric overfoot and overshoe footwear designed to provide additional isolation or insulation of workers if in accidental contact with energized electrical conductors, apparatus, or circuits.


    PPE Regulation (EU) 2016/425 - Personal Protective Equipment

    The Regulation defines “essential requirements” which PPE must satisfy at the time of manufacture and before it is placed on the European market: the general requirements applicable to all PPE; the additional requirements specific to certain types of PPE; and also the additional requirements specific to particular risks.


    EN ISO 20347:2012

    Specifies basic and additional (optional) requirements for occupational footwear that is not exposed to any mechanical risks (impact or compression) on the toe.


    EN ISO 20345:2011 & EN ISO 20347:2012 Markings:

    SB Meets the basic requirements of safety footwear in EN20345:2011

    S5 As SB, but with the following additional requirements: Closed seat region, Antistatic properties, Energy absorption of seat region, Resistance to fuel oil, Penetration resistance, Cleated outsole.

    HRO Outsole - Resistance to hot contact

    SRA Slip resistance on ceramic tile floor with NaLS

    SRC Slip resistance on ceraminc file floors with NaLs (SRA) and slip resistance on steel floor with glycerol (SRB)

    FO Outsole - Resistance to fuel oil

    CI Cold insulation of sole complex

    E Energy absorption of seat (heel) region

    P Penetration resistance

    CR Cut resistance

    A Antistatic

    I Insulating


    How we test our boots


    We test every element of our boots to ensure their safety, performance and comfort. Some testing is carried out at our factory while some is undertaken for us at specialist accredited testing laboratories. Our factory can conduct, high-voltage testing, deformation testing on toecaps, flex cracking and low temperature flex cracking on boot compounds. Boots are also extensively trialled by users to check for comfort, wear and durability during development.

    Chemical Permeation Testing

    We thoroughly test our compounds materials for their chemical resistance at an independent UKAS accredited laboratory for chemical permeation testing and for testing the physical properties of materials. We regularly re-test our fabrics and seams to ensure quality. 

    Find out more


    Every pair of Workmaster™ Dielectric boots is electrically tested to EN 50321:2000 prior to dispatch. The test involves filling the boot with water and submerging it in a water bath, an electrode is placed inside the boot, with a second electrode connected to the metal frame of the bath. A test voltage is then applied. Boots are tested at 5kV for leakage current and are then submitted to a withstand test at 10kV for three minutes.

    We regularly test samples from production at 20kV (which requires a slightly different setup for the test rig), and customers can specify boots are tested at this higher voltage if required.

    Find out more


    EN 50321-1:2018 is the new standard for insulating footwear for live working and was published earlier this year, it replaces EN 50321:1999 and is currently out for approval as an IEC standard which will make it a global standard, not just European. The main changes in the 2018 revision are the introduction of new 4 classes for working up to 36 KV (the old standard only went up to Class 0 - 1 KV).

    Find out more

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    Our boots and overboots are available in a broad range of sizes. Workmaster™ Compact overboots are designed for use over a conventional safety shoe or safety trainer, while the Maxi overboots are designed for use over traditional safety boots.

    Workmaster™ boots are generously sized as they are designed to accommodate wearers with thicker socks or a thermal lining. We recommend downloading the A3 Size Guide below to ensure the perfect fit.


    Boot Sizing


    UK 3 4 5 6 7 8 9 10 11 12 13 14 15
    EU 35 36 37 39 41 42 43 44 45 46 47 49 50
    US 4 5 6 7 8 9 10 11 12 13 14 15 16

    OVERBoot Sizing


      Medium Large Extra-Large
    UK 6 - 8 9 - 11 12 - 14
    EU 39 - 42 43 - 45 46 - 49
    US 7 - 9 10 - 12 13 - 15

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