The Kosto X-PRO CHK230 and CHK231 Class AE harnesses are designed for fall arrest and retrieval applications, combining advanced safety with breathable comfort. Both models feature 5 adjustment points, an aluminum dorsal D-ring, and two zinc-coated steel shoulder D-rings for worker extraction. Integrated trauma suspension straps, a seat strap, and breathable honeycomb padding at the shoulders and thighs improve both safety and comfort during long shifts. Classified as Class AE, these harnesses meet the needs of workers requiring reliable fall arrest protection (Class A) and retrieval capability (Class E) in demanding industrial environments.

Key Features

Dual functionality: Certified Class A fall arrest and Class E retrieval.
Shoulder retrieval rings: Two steel D-rings allow safe vertical extraction.
Quick donning: Chest quick-connect buckle for secure setup.
Variant options: CHK230 with quick-connect legs, CHK231 with tongue buckle legs.
Durable materials: 100% polyester webbing with zinc-coated steel hardware.
Comfort padding: Breathable honeycomb pads at shoulders and thighs reduce heat buildup.
Integrated trauma straps: Resettable straps for post-fall suspension safety.
Ergonomic design: Seat strap and PVC X-back to prevent tangling and slippage.
Inspection-ready: Impact indicator and label protector with QR code access.

Intended Use

These harnesses are intended for workers at height who require both fall arrest protection and retrieval capability, ensuring compliance and reliability across industries.

Construction and general contracting
Structural steel and welding operations
Industrial manufacturing and fabrication
Oil & gas and petrochemical facilities
Mining and heavy industry
Utilities and energy sector maintenance
Transportation, warehousing, and shipping
Bridge and infrastructure maintenance
Confined space entry and vertical extraction tasks
Scaffolding and elevated platform work

Variant Differentiation

CHK230: Class AE harness with quick-connect leg buckles for fast donning and removal.
CHK231: Class AE harness with tongue buckle leg adjustments for secure fit and versatility.

Product Specifications

Product Type: Class AE safety harness (fall arrest + retrieval)
Material: 100% polyester webbing
Dorsal D-Ring: Aluminum
Shoulder D-Rings: Zinc-coated steel (2)
Chest Buckle: Quick-connect steel
Leg Buckles: Quick-connect (CHK230) or tongue buckle (CHK231)
Adjusters: Zinc-coated steel
Trauma Straps: Integrated, resettable
Seat Strap: Included
PVC X-back: Prevents slippage and tangling
Padding: Honeycomb pads at shoulders and thighs
Lanyard Keeper: Included
SRL Slots: Dual
Maximum Arresting Force: 8 kN (1800 lbs)
Harness Stretch: 0.6 m (2 ft)
Tensile Strength: 22 kN (5000 lbs)
Capacity: 59–141 kg (130–310 lbs)
Sizes: S/M and L/XL

Certifications and Standards

CSA Z259.10-18, Class AE: Canadian standard for harnesses certified for fall arrest (Class A) and retrieval (Class E).
ANSI Z359.11-2021: U.S. standard for full-body harness design and performance.
ANSI A10.32-2023: U.S. safety requirements for fall protection in construction and demolition.
OSHA 1910 / 1926 Subpart M: Federal regulations for fall protection in industry and construction.