Miller AirCore AC-TB Harnesses, Breathable Full-Body Harness, 13 configurations

Miller AirCore AC-TB is a safety harness: PIP describes it as "Premium Breathable Full-Body Harness with Steel Hardware, 5 Points of Adjustment, Back D-Ring and Quick-Connect Chest Buckle & Tongue Leg Buckles". Capacity as published by PIP: 400 lb (PIP product data, spec sheet), 420 lb (Miller catalog). PIP lists ANSI Z359.11. Sizes X-Small, S/M, L/XL, 2XL/3XL and 4X-Large. Sold individually. 75 part numbers; the full list is in the family table below. Part of the AirCore series. Ships in 1–2 business days; most orders arrive in 3–7 business days.

PIP AC-TB specifications

Source: PIP Rich Product Data, October 2026; PIP specification sheet AC-TB.

Ratings and standards

Source: PIP Rich Product Data, October 2026; PIP specification sheet AC-TB; Miller Fall Protection Catalog (PIP, September 2025), pages 46–55 ("These harnesses meet OSHA and certified ANSI Z359.11 (catalog wording); some SKUs are certified CSA Z259.10. Rated up to 420 lb (max. weight capacity)"). Ratings are as published by the manufacturer or the named standard, not a recommendation for any task; the end user decides suitability.

Features

• Breathable, open-core padding provides optimal air flow, keeping workers drier and cooler
• Patented DuraFlex stretchable webbing provides greater flexibility and increased comfort
• Easy adjustment with cam buckles on shoulder straps
• Contoured ergonomic padding design minimizes contact to reduce chaffing and irritation
• Stand-up back D-ring for easy adjustment
• Quick-connect chest strap buckles for easy donning
• Lightweight materials and components reduce fatigue for all-day endurance and increased productivity
• Durable knitted mesh back shield minimizes moisture absorption and maintains optimal air circulation
• Supports a weight capacity of 400 lbs, ensuring durability and reliability
• Meets OSHA, Certified ANSI and CSA standards for fall protection equipment

Source: PIP Rich Product Data, October 2026, PIP feature list for style AC-TB, verbatim.

PIP AC-TB family

PIP AC-QC family

PIP AC-TB-D family

PIP AC-QC-D family

PIP AC-TB-BDP family

PIP AC-QC-BDP family

PIP ACSD-QC family

PIP ACF-QC family

PIP ACF-TB family

PIP ACF-QCD family

PIP ACF-TBD family

PIP ACF-QCBDP family

PIP ACF-TBBDP family

Related Miller part numbers

Source: PIP Rich Product Data, October 2026; Nov 1 2026 PIP price list. Each part number links to its own page.

Miller AC-TB questions

How many points of adjustment does the AC-TB have? 5, as PIP lists it.

What standards does PIP list for the AC-TB? ANSI Z359.11, as PIP lists it.

What is the AC-TB made of? Polyester webbing, padded, as PIP lists it.

What is the weight capacity of the AC-TB? 400 lb, as published by PIP.

What sizes does the AC-TB come in? X-Small to 4X-Large, as PIP lists it.

Which D-rings does the AC-TB have? Back. See the guide on what each D-ring is for.

Guides: OSHA harness requirements · how to put on a harness · what each D-ring is for · harness inspection · harness service life · suspension trauma · types of safety harnesses · every fall protection item by type and standard.

Literature: Miller Harness Inspection Guide (PIP, 2026) (PDF) · Miller Fall Protection Catalog (PIP, September 2025) (PDF).

Manufacturer item number: AC-TB. Spec sheet: PIP specification sheet (PDF).

The Miller AirCore™ harness with steel hardware is a premium full-body harness for climbing and high-risk work. Open-core AirCore™ padding keeps air moving to cut heat and moisture, patented DuraFlex® stretch webbing moves with the body, and the contoured design keeps webbing off the neck, lower back and inner thighs. Choose the D-ring and buckle configuration, then the color and size.

• Breathable open-core AirCore™ padding with a knitted mesh back shield
• Patented DuraFlex® stretchable webbing; cam buckles on the shoulder straps
• Steel hardware; stand-up back D-ring
• Five points of adjustment; dual-tab release buckles
• Rated up to 400 lbs; meets OSHA, ANSI and CSA

Configuration key: QC = quick-connect buckle, TB = tongue buckle, MB = mating buckle; "Belt & Pad" = integrated positioning belt with lumbar pad. D-rings are listed by position (back = dorsal fall-arrest ring; side = hip positioning rings; front = sternal ring; shoulder = rescue/retrieval rings).