Safety Direct MK1011110 FR / Arc Safe Harness | Canada

Safety Direct MK1011110 Flame Guard and Arc Breaker harness. A vest-style Class A fall arrest harness with a single dorsal D-ring, built for welders and electrical crews. Flame Guard versions are flame resistant with pass-through, tongue-buckle (grommet) leg, QC chest, QC or X-pad options. Arc Breaker versions are arc safe and come with a dielectric dorsal D-ring and buckles (pass-through or QC) or a soft web dorsal D-ring, so there is no metal at the back.

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Compliance in Canada: CSA Z259.10-18, Class A, Arc Safe / FRSafety Direct's MH1011110 page lists the MK1011110 Kevlar versions and states that the line is certified to CSA Z259.10-18. Its 2026 catalogue lists the MK1011110 in its Class A welder (Flame Guard, FR) and Class A arc safe (Arc Breaker) fall arrest sections. The Arc Breaker versions are not on that page, so check their label for the CSA mark. An arc-rated harness does not replace arc flash PPE. Inspect before each use and remove from service after any fall.

Equipment type

Full-body harness

Class

A (fall arrest)

Protection

FR / Arc Safe

Sizes

XS-3XL, Universal

Safety Direct MK1011110 FR and arc safe harness key features

Vest-style Class A fall arrest harness with a single dorsal D-ring
Flame Guard (FR) versions for welding, cutting and hot work
Arc Breaker (Arc Safe) versions with dielectric dorsal D-ring and buckles
Arc Breaker R version with a soft web dorsal D-ring
Buckle choices: pass-through, tongue-buckle legs, QC chest or full QC
Optional X-pad back pad (P version); eight sizes XS to 3XL plus Universal

Safety Direct MK1011110 harness specifications and sizing

Manufacturer	Safety Direct Ltd., Sherwood Park, Alberta
Model	MK1011110 Flame Guard / Arc Breaker (64 SKUs)
Style	Vest style
Class	Class A fall arrest (per Safety Direct 2026 catalogue)
D-ring	Dorsal (back): standard on Flame Guard, dielectric (DB, DBQ) or soft web (R)
Arc Breaker versions	DB dielectric D-ring and buckles; DBQ dielectric D-ring, QC buckles; R soft web D-ring
Flame Guard versions	Pass-through; G tongue-buckle legs; GQ tongue-buckle legs, QC chest; P X-pad; Q QC buckles
Capacity by size	XS 80-110 lb, S 110-150 lb, M 120-190 lb, L 130-270 lb, XL 170-325 lb, 2XL 210-370 lb, 3XL 230-420 lb, U 115-250 lb
Sizes	XS, S, M, L, XL, 2XL, 3XL, U (Universal)

Where the MK1011110 FR and Arc Breaker harness works best

Welding and cutting

Flame Guard webbing for hot work at height.

Electrical utilities

Arc Breaker with no metal D-ring at the back.

Fabrication shops

Flame-resistant harness for hot work areas.

Fast donning

QC buckle versions clip on and off quickly.

Canadian store

Sold by Fall Protection Canada, Paris, Ontario. CAD pricing, no duties, no border surprises, Canada-wide shipping.

MK1011110 FR and arc safe harness questions and CSA status

Is the Safety Direct MK1011110 CSA certified?

Safety Direct's MH1011110 page lists the MK1011110 Kevlar versions and states that the line is certified to CSA Z259.10-18. The Arc Breaker versions are not on that page, so check their label for the CSA mark.

What is the difference between Flame Guard and Arc Breaker?

Flame Guard versions are flame resistant (FR) for welding and hot work. Arc Breaker versions are arc safe and use a dielectric or soft web dorsal D-ring instead of a standard metal one.

What worker weight does the MK1011110 fit?

It depends on size: XS 80-110 lb, S 110-150 lb, M 120-190 lb, L 130-270 lb, XL 170-325 lb, 2XL 210-370 lb, 3XL 230-420 lb, U 115-250 lb.

Does the MK1011110 have side D-rings?

No. Safety Direct lists it with a dorsal D-ring only, for fall arrest. For positioning choose a Class AP harness.

Pair the MK1011110 FR harness with a full system

Pair the MK1011110 with an FR or Kevlar shock-absorbing lanyard or self-retracting device and a rated anchor for a complete fall arrest system.

Safety Direct MK1011110 Flame Guard / Arc Breaker Harness | Canada

Safety Direct MK1011110 Flame Guard / Arc Breaker Harness instructions and documents