ExoFit X300 Class AE Vest Style Extraction DBI-SALA 3M Harness

ExoFit X300 Class AE Vest Style Extraction DBI-SALA 3M Harness

The DBI-SALA 3M ExoFit X300 Class AE harness (Sylprotec ref. FPH1113061CAE) is a full-body fall arrest and extraction harness designed for workers who perform confined space entries and must be equipped for emergency extraction. Class AE combines two essential functions: the letter A designates fall arrest via the dorsal ring, and the letter E designates confined space recovery via the two shoulder rings.

This vest-style harness features three aluminum D-rings: one stand-up dorsal ring with an anti-slide keeper and two shoulder rings dedicated to vertical extraction from a confined space. Patent-pending 3M auto-locking buckles, an integrated SRL adapter, auto-close keepers, and included post-suspension trauma straps make this a comprehensive solution for teams working in tanks, vessels, sewers, manholes, and tunnels. The integrated 3M Connected Safety ID (RFID) enables digital management of inspections and equipment usage history.

Compliant with CSA Z259.10-18, this harness is made to order by 3M; allow approximately one month for delivery.

Technical Features of the ExoFit X300 Class AE Harness

This fall arrest and extraction harness is equipped with three aluminum D-rings in a layout specific to Class AE. The dorsal ring is a stand-up ring with an anti-slide keeper: this mechanism orients the ring perpendicular to the connector axis for optimal attachment during a fall. The two shoulder rings are exclusively dedicated to confined space recovery and extraction; they are not fall arrest attachment points.

The patent-pending 3M auto-locking buckles resist accidental release and provide a higher level of security compared to traditional tongue or pass-through buckles. The quick-connect leg buckles simplify donning and doffing, even in challenging field conditions. The integrated SRL adapter on the dorsal ring allows direct attachment of a self-retracting lifeline without an additional connector. Auto-close keepers hold webbing in place after adjustment, preventing tangles during work or extraction.

The included post-suspension trauma straps are designed to be deployed by a suspended worker to shift into a semi-upright position while awaiting rescue, reducing pressure on the femoral arteries and the risk of suspension trauma syndrome. The vest-style construction provides full torso support for improved comfort throughout long shifts.

Load Capacity and Standards of the ExoFit X300 Class AE

The ExoFit X300 Class AE harness is rated for a maximum capacity of 310 lb (140.6 kg), including the worker, clothing, tools, and all worn equipment. The polyester webbing has a breaking strength of 6,000 lb (2,722 kg), providing a substantial safety margin during fall arrest. This harness is compliant with Canadian standard CSA Z259.10-18, which establishes the minimum performance requirements for fall arrest harnesses, retrieval harnesses, and combination harnesses.

Compliance with this standard means the ExoFit X300 has undergone rigorous dynamic strength testing, hardware slip testing, and simulated fall performance testing. CSA Z259.10-18 is recognized by provincial and federal occupational safety regulators across Canada. The 310 lb capacity includes all equipment worn on the body; verify that total load does not exceed this limit prior to each use.

Materials and Hardware of the ExoFit X300 Class AE Harness

The webbing of the ExoFit X300 harness is made from high-strength polyester, a material known for its dimensional stability, resistance to mild acids and UV exposure, and durability in demanding industrial environments. The breaking strength of the webbing reaches 6,000 lb (2,722 kg), far exceeding the minimum requirements of CSA Z259.10-18. All hardware, including the three D-rings and all buckles, is aluminum alloy.

This material choice provides an excellent strength-to-weight ratio compared to steel, combined with good corrosion resistance in humid or mildly chemical environments. The 3M Connected Safety ID (RFID) is a chip integrated directly into the harness, linking it to a digital equipment management profile via 3M connected safety tools. This system facilitates inspection tracking, service date verification, and fleet management across an organization.

The 3M Connected Safety ID (RFID) is independent of the ring material and is present across the entire ExoFit X300 product line.

Applications: Confined Space Entry, Industrial Extraction, and Work at Height

The ExoFit X300 Class AE harness is the preferred equipment for workers who regularly enter confined spaces such as storage tanks, chemical vessels, valve chambers, sewers, manholes, tunnels, silos, and hoppers. The two shoulder rings allow a surface rescue team to vertically retrieve an unconscious or injured worker from a confined space while maintaining head alignment, which is critical to preventing cervical injuries during emergency extraction.

This model is well suited to the oil and gas industry, wastewater treatment plants, breweries and distilleries, food processing facilities, mines, refineries, and any sector where confined space entry procedures govern daily operations. For work at height, the stand-up dorsal ring connects efficiently to a lanyard or self-retracting lifeline for fall arrest. Five available sizes, from Small to 2XL, allow precise anatomical fit for each worker, ensuring comfortable wear throughout full-day interventions.

Inspection of the ExoFit X300 Harness Before Each Use

The worker must visually and tactilely inspect the entire harness before each use. This check covers the webbing (cuts, tears, burns, chemical stains, fraying), stitching (missing or damaged stitches), D-rings (deformation, cracks, corrosion marks), buckles (proper function, no excessive wear or deformation), and the 3M Connected Safety ID (RFID) (physical integrity of the chip). Any equipment showing a defect, even a minor one, must be immediately removed from service and reported to a supervisor.

In addition to this daily verification, a competent person must perform periodic inspections at regular intervals set by the employer, typically every 90 or 180 days depending on frequency of use and work environment. The recommended maximum service life is 5 years from the date of first use for regular use, or 10 years from the manufacturing date, whichever comes first.

A harness that has undergone a fall must be immediately removed from service, even if no visible damage is apparent, as webbing and stitching may have been stressed beyond their elastic recovery limit. Sylprotec offers a professional inspection service for fall protection equipment to help your organization maintain regulatory compliance.

Care and Cleaning of the ExoFit X300 Class AE Harness

To maintain the ExoFit X300 harness in good working condition and extend its service life, clean it regularly with mild soap and warm water at a maximum temperature of 37°C (98.6°F). Never use bleach, solvents, harsh chemical cleaners, or abrasive pads, which degrade polyester fibers and the surface treatments of aluminum hardware. After cleaning, allow the harness to air-dry away from direct heat sources (radiators, dryers, prolonged direct sunlight).

Excessive heat and UV exposure accelerate webbing degradation and reduce its tensile strength. When not in use, store the harness in a clean, dry location away from direct light. If the harness has come into contact with oils, chemicals, solvents, or other contaminants, inspect it carefully and, if there is any doubt about the integrity of the webbing or hardware, remove it from service and replace it. A clean and well-maintained harness is also easier to inspect visually before each shift.

FAQ: ExoFit X300 Class AE for Confined Space and Extraction

What is the difference between a Class A harness and a Class AE harness?

A Class A harness is equipped with a single dorsal ring intended for fall arrest during work at height. A Class AE harness, like the ExoFit X300, adds two shoulder rings (the letter E stands for confined space entry) to enable vertical extraction of a worker in an emergency. These shoulder rings allow a surface rescue team to lift the worker without placing strain on his limbs or compressing the neck, which is essential for safe extraction.

A Class A harness alone is not suitable for confined space entry procedures that require a retrieval means, because the dorsal ring alone does not allow safe head and neck alignment during vertical retrieval.

Does the integrated SRL adapter on the ExoFit X300 replace a lanyard?

No. The integrated SRL adapter is a connection accessory that allows a self-retracting lifeline to be attached directly to the dorsal ring without an additional connector. It is not itself a fall arrest device. For work at height or confined space entry with vertical descent, the harness must always be combined with a compliant fall arrest device, whether a self-retracting lifeline, a shock-absorbing lanyard, or another approved device compliant with applicable CSA standards.

The SRL adapter simplifies the connection and reduces the risk of accidental snagging on the connector, but the fall arrest device itself remains mandatory.

Why are post-suspension trauma straps important for confined space work?

When suspended and unable to move, a worker can develop suspension trauma, a potentially fatal condition caused by harness webbing compressing the femoral vessels, which reduces venous return to the heart. The post-suspension trauma straps included with the ExoFit X300 Class AE allow the suspended worker to shift into a semi-upright position by bracing against the straps, relieving pressure on the thighs and extending the survival window while awaiting rescue.

In confined spaces, response times may be longer than for above-ground work due to entry procedures and the complexity of retrieval. The presence of these trauma straps therefore represents a significant additional safety advantage for this type of application.

Complementary Equipment for Confined Space and Work-at-Height Operations

To build a complete fall arrest and confined space rescue system around this ExoFit X300 Class AE harness, consider adding a lanyard with energy absorber (FPL5400), an automatic ropegrab with panic lock (FPACC), a leading edge retractable lifeline (FPLR75105-6LE), a flexible steel anchor sling (FPAE), self-locking D-shaped carabiners (FPAM86), a confined space rescue tripod kit (FPLRK1) and a safety helmet (TA222), all grouped under the "Accessories" section at the bottom of the page.

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