Static electricity is trivial in an office and dangerous in two settings, and the same garment decision protects against both. Before speccing antistatic workwear, it helps to understand why the hazard is real and how the standard actually certifies a garment against it.
Why static is a real hazard, not a nuisance
In electronics manufacturing, an electrostatic discharge of just a few volts — far below what a human can feel — can damage or latently weaken sensitive components, causing field failures that are expensive to trace. In explosive atmospheres (ATEX zones) — fuel handling, petrochemical, grain, paint — a static spark can ignite vapour or dust. In both cases the garment is part of the control system, alongside flooring, footwear and wrist straps; it is never a standalone fix.
EN 1149: the parts that matter
EN 1149 is a family of test methods, and a garment label should tell you which part it was tested to:
| Part | What it measures | Why it matters |
|---|---|---|
| EN 1149-1 | Surface resistivity | How easily charge moves across the fabric surface |
| EN 1149-2 | Vertical (through-material) resistance | Charge transfer through the fabric thickness |
| EN 1149-3 | Charge decay / shielding (half-decay time) | How fast the fabric dissipates a charge |
| EN 1149-5 | Material & design requirements for garments | The performance and construction spec you buy to |
EN 1149-5 is the one to specify on a PO — it sets the material performance (referencing -1 or -3) and the design rules, such as the requirement that the conductive fabric is electrically continuous and that the garment fully covers non-compliant inner layers.
How the fabric is actually made
Antistatic fabric is not a wash-off finish. It is woven with a conductive grid — a fine carbon-cored or carbon-coated filament laid in a stripe or grid pattern through the polyester or poly-cotton base. That grid dissipates charge continuously and does not wash out, which is why ESD garments show a faint stripe pattern. Because the protection is structural, the garment design matters: conductive components must connect, and the wearer must keep the garment closed for it to work — an open jacket exposes a non-compliant inner layer and breaks the system.
ESD is rarely the only requirement
Few crews need antistatic protection alone. Fuel and petrochemical workers usually need FR + antistatic together (a flash-fire hazard plus an ignition-source hazard), so look for garments dual-certified to EN ISO 11612 and EN 1149-5. Outdoor electrical and utility crews may need hi-vis + antistatic. Layering matters: putting a non-ESD fleece over a certified ESD coverall can defeat the protection, so the whole worn ensemble — not just the base garment — has to be considered.
What to demand before you pay
- A test report to EN 1149-5, naming the accredited lab and the specific fabric and colour tested
- Confirmation the conductive grid is woven-in, not a topical finish, with stated wash durability
- For dual hazards, co-certification (e.g. EN ISO 11612 + EN 1149-5) on the same garment
- Care instructions — some ESD fabrics require specific laundering to preserve conductivity
- Guidance on the complete ensemble, including footwear and inner layers, since the standard is system-dependent
Speccing ESD or FR-antistatic workwear?
Tell us the hazard — electronics ESD, ATEX zone, or combined flash-fire — and we will quote EN 1149-5 garments, dual-certified with EN ISO 11612 where needed, with accredited test reports.
Request an ESD quote →