CMC ATOM Chest Harness
CMC ATOM Chest Harness $204.40

CMC ATOM Chest Harness

CMC |
SKU: 202363
$204.40
  • Sit-to-Full-Body Conversion: Transforms an ATOM Sit or BYO ATOM Sit harness into a full NFPA Class III life safety harness.
  • Dual D-Ring Attachment: Sternal and dorsal steel D-rings provide low-profile attachment points that fit multiple carabiners.
  • Load-Transfer Comfort: Integrated load transfer from the chest to the sit harness improves comfort during a vertical lift.
  • Weather-Resistant Build: Water-repellent, UV-resistant webbing and breathable D3 cloth padding, weighing 1.87 lb (0.85 kg) in one size fits most.
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CMC ATOM Chest Harness

The CMC ATOM Chest Harness transforms the ATOM Sit or BYO ATOM Sit into a full body NFPA Class III Life Safety Harness, adding comfort and versatility for high angle rescues while letting teams keep the mobility of a sit harness until a full body unit is needed.

Key Features and Highlights

  • Full Body Upgrade: Transforms an ATOM Sit or BYO ATOM Sit into an NFPA Class III Life Safety Harness.
  • Robust Attachment Points: Sternal and dorsal steel D-rings provide low-profile attachment points that fit multiple carabiners.
  • Load Transfer: Integrated load transfer from the chest attachment points to the sit harness increases comfort in a vertical lift.
  • Ascender Compatible: Works with a variety of chest ascenders that can be added or swapped using the ATOM Chest Ascender Kit.
  • Quick On/Off: Built for all-day comfort and security while being quick to install or remove.
  • Durable Materials: Water-repellent, UV resistant webbing with breathable D3 cloth in the dorsal padding.
  • Wear Inspection: Contrasting thread aids wear inspection, with Black Web Keepers to secure loose ends.

Who Is This Product For?

Ideal for: Teams who want the option to convert an ATOM Sit Harness into a full body Class III harness for high angle rescue work.

Materials and Construction

Weighs 0.85 kg (1.87 lb) and fits one size most, for a chest size up to the harness’s adjustable range. The current ATOM Sit (PN# 202B) uses a rear oval ring, and pairing it with the ATOM Chest creates an NFPA Class III harness without extra hardware; the previous ATOM Sit (PN# 202A) uses a soft loop and needs a Trapezium Quick-Link, and that combination keeps its Class II rating rather than Class III. This model replaces the ProSeries Chest Harness.


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