CSA Work Boot Symbols Explained: Green Triangle, Yellow Triangle and Omega (2026)

The symbol on the side of a CSA work boot tells you exactly which protections it carries. A green triangle means Grade 1 toe protection plus a puncture-resistant sole. A yellow triangle means Grade 2 toe protection plus a puncture-resistant sole. The other marks cover electrical hazards, metatarsal guards and chainsaw protection. The mark is a specification, not a quality rating.

Getting this wrong has consequences. A worker sent home from a site for the wrong footwear loses a shift, and an employer who specifies the wrong mark has a gap in their hazard assessment. This guide decodes every mark under CSA Z195, explains what each one is tested against, and shows you how to spot a product listing that describes them incorrectly.

What do the symbols on CSA work boots mean?

Each symbol is a printed or moulded patch identifying a specific tested protection. Under CSA Z195 the shape and colour of the patch both carry meaning, so a triangle and a rectangle in the same colour are not the same certification. Boots can carry more than one mark, and the 2014 edition of the standard introduced combination labels for footwear with several protections.

The CCOHS guidance on safety footwear is direct about how to use these marks: assess the materials handled, the risk of objects falling onto or striking the feet, and anything that might roll over them, then select footwear with the proper rating for that hazard.

Mark	Protection certified	Where it is required
Green triangle	Grade 1 toe, 125 joule impact, plus puncture-resistant sole	Construction, heavy industrial, sites with nails or rebar underfoot
Yellow triangle	Grade 2 toe, 90 joule impact, plus puncture-resistant sole	Lighter industrial work with puncture risk but lower impact risk
Blue rectangle	Grade 1 toe protection, no puncture-resistant sole	Warehouse and manufacturing floors kept clear of sharp debris
White rectangle with orange omega	Electric shock resistant sole and heel	Work where live electrical conductors may be contacted
Yellow rectangle with green SD	Static dissipative sole. SD+ marks the super static dissipative category	Electronics assembly, sensitive instrument work
Red rectangle with white C	Electrically conductive sole	Specialised settings only, never near live conductors
Dark grey rectangle with white M	Metatarsal protection across the top of the foot	Foundries, heavy fabrication, anywhere heavy objects can drop
White rectangle with green fir tree	Chainsaw protection	Forestry, tree care, sawmill work

One structural rule ties the table together. All footwear except conductive and static dissipative types must have protective toecaps fitted, so an electrical or metatarsal mark almost always appears alongside a toe grade rather than instead of one.

Green triangle or yellow triangle: what is the difference?

Impact rating. A green triangle certifies a Grade 1 toe cap tested to 125 joules, while a yellow triangle certifies a Grade 2 toe cap tested to 90 joules. Both include a puncture-resistant sole. Green triangle is the more protective of the two and is what most Canadian construction and heavy industrial sites specify by default.

The puncture-resistant sole in both grades is a plate rated to resist a load of at least 1,200 newtons. That is the component protecting you from a nail through the sole, and it is the reason a green or yellow triangle boot behaves differently on a framing site than a plain safety shoe does.

The toe cap material is a separate question from the grade. Steel and composite caps can both meet Grade 1, and the choice between them comes down to weight, cold transfer and whether your site has metal detection. Our comparison of steel toe and composite toe work boots works through that decision. If your workplace requires metal-free footwear, the Terra Ironstone metal-free CSA boot is one option that keeps the certification without the metal.

What does the blue rectangle mean?

A blue rectangle certifies Grade 1 toe protection with no puncture-resistant sole. The toe cap performs identically to a green triangle boot. What it lacks is the plate protecting the underside of your foot, which makes it suitable for controlled floors and unsuitable anywhere sharp debris is present.

This is the mark workers most often get caught out by. A blue rectangle boot is genuinely CSA certified and genuinely has a Grade 1 toe, so it looks compliant at a glance. On a site that specifies puncture protection, it is not. Read the shape, not just the presence of a mark.

Warehouse and distribution floors are the common home for blue rectangle footwear, and our guide to choosing work boots for your job in Canada covers how to match the mark to the environment.

What does the white rectangle with the orange omega mean?

It certifies electric shock resistant soles and heels, tested at manufacture to withstand 18,000 volts with leakage no greater than 1 milliamp over 60 seconds. The omega is the symbol for ohms, the unit of electrical resistance. This protection degrades with wear, moisture and sole damage, so it is not a permanent property of the boot.

Several Canadian retail sites describe this mark as a white triangle. Others call it a white square. It is a white rectangle. This matters beyond pedantry: a listing that misdescribes the shape is a listing whose specifications you should not rely on when your protection from a live conductor is the thing being described.

Electricians, utility crews and anyone working near energized equipment should be looking for this mark specifically. The CAT Outline 6-inch CSA steel toe boot and the Baffin Maximum CSA steel toe rubber boot are both EH rated. For trade-specific guidance, see our guide to work boots for electricians.

SD, SD+ and the red C: static dissipative versus conductive

These two look similar on a label and do opposite jobs. Static dissipative footwear, marked with a yellow rectangle carrying a green SD, bleeds electrostatic charge away in a controlled, resisted way. Conductive footwear, marked with a red rectangle carrying a white C, deliberately conducts charge to ground with minimal resistance and offers no protection from live conductors.

The 2014 revision of the standard added a second static dissipative category, marked SD+ and described as super static dissipative, for people working with electronics and sensitive instruments. The same revision added specific labels for metatarsal guards and allowed combination multi-patch labels on footwear carrying several protections.

Conductive footwear is also one of only two categories exempt from the requirement for protective toecaps, alongside static dissipative. If you are issued conductive boots, confirm separately whether your hazard assessment also calls for toe protection, because the conductive mark does not imply it.

Metatarsal, chainsaw and combination labels

A dark grey rectangle carrying a white M certifies metatarsal protection: a guard covering the top of the foot between the toes and the ankle. Toe protection is required on all metatarsal protective footwear, so this mark always appears alongside a toe grade. A white rectangle with a green fir tree certifies chainsaw protection for forestry and tree care work.

CCOHS advises using metatarsal protection wherever there is potential for injury to the top of the foot, which in practice means foundries, heavy fabrication, and anywhere loads are moved above foot height. Welders in particular benefit from metatarsal coverage combined with a design that sheds sparks, as covered in our guide to work boots for welders.

One limit is worth knowing. CSA Z195 covers protective footwear as manufactured and explicitly does not address over-the-shoe toe protectors, slip-on toe caps, overshoes, attachable metatarsal guards, anti-slip devices or protective inserts, because these are not considered integral to the footwear. A strap-on met guard does not make a boot a metatarsal-certified boot.

Slip resistance is marked differently

Slip resistance is covered by CSA Z195 but is not one of the coloured hazard patches. The standard sets requirements for slip-resisting footwear with or without other protective features, which means traction is certified separately rather than being implied by a green or yellow triangle.

This trips people up because slips and falls are among the most common workplace injuries, and workers reasonably assume a fully certified boot has been tested for grip. It may have been, but the toe and puncture marks do not tell you that. Check the product specification for slip resistance explicitly.

Outsole compound and tread geometry do most of the work here, and the right choice depends on whether you are on wet concrete, oily plate or ice. Our guide to slip resistance at work covers how to match an outsole to a surface. For wet Canadian conditions, the J.B. Goodhue Condor waterproof CSA boot is built for the job.

How to read a boot tag and spot a bad listing

Look for the physical patch on the boot, side-stitched or heat-sealed, rather than a claim in a description. Certification applies to the footwear as manufactured, and a steel toe with no CSA patch is not certified footwear regardless of what the listing says. Then check the shape and colour of the patch against the table above.

Three signals that a listing is unreliable. First, it describes the omega mark as a triangle or a square. Second, it treats certified and compliant as interchangeable terms, which they are not, as covered in our guide to CSA certified versus CSA compliant footwear. Third, it cites a superseded edition of the standard.

On that last point, the standard is currently published by CSA Group as CSA Z195:14, reaffirmed in 2025. Many retail pages still cite the 2019 reaffirmation. It is a small detail that tells you how recently a supplier checked their own reference material.

Context for why any of this exists: CSA Group reports that after the Ontario construction industry provided CSA-approved protective footwear and required its use, the frequency of foot injuries in that sector fell by 60 percent between 1968 and 1984. The marks are the mechanism that makes that requirement enforceable on a job site.

If you are choosing a boot rather than decoding one you already own, our complete guide to CSA work boots in Canada works through toe material, waterproofing and shaft height in order.

Frequently Asked Questions

What does the green triangle on work boots mean?

A green triangle on Canadian safety footwear indicates Grade 1 toe protection tested to 125 joules of impact, combined with a puncture-resistant sole rated to resist at least 1,200 newtons. It is the most commonly specified mark on Canadian construction and heavy industrial sites, and it is what most employers mean when they ask for CSA-approved boots.

What is the difference between a green triangle and a yellow triangle?

Impact rating. A green triangle certifies a Grade 1 toe cap tested to 125 joules. A yellow triangle certifies a Grade 2 toe cap tested to 90 joules. Both include a puncture-resistant sole. Green triangle offers the higher level of toe protection and is the more common site requirement in Canada.

Is the electrical shock resistance mark a triangle or a rectangle?

It is a white rectangle carrying an orange omega symbol, the symbol for ohms of electrical resistance. Several Canadian retail websites incorrectly describe it as a white triangle or a white square. If a product listing gets this shape wrong, treat its other specifications with caution before relying on them.

What does the blue rectangle mean on a work boot?

A blue rectangle certifies Grade 1 toe protection with no puncture-resistant sole. The toe cap matches a green triangle boot, but there is no plate protecting the underside of the foot. It suits controlled warehouse and manufacturing floors and is not appropriate where nails, rebar or other sharp debris are present.

What does M mean on a CSA work boot?

A dark grey rectangle carrying a white M certifies metatarsal protection, meaning a guard covering the top of the foot between the toes and the ankle. Toe protection is required on all metatarsal protective footwear, so this mark appears alongside a toe grade rather than replacing it. Strap-on aftermarket guards are not covered by the standard.

Do all CSA work boots have toe protection?

Almost all of them. Under CSA Z195 every category except conductive and static dissipative footwear must have protective toecaps fitted. If you are issued conductive or static dissipative boots, check your hazard assessment separately for whether toe protection is also required, because those marks do not imply it.