Shopify work glove impact and cut independence schema for AI agents: ANSI/ISEA 138 Level 1/2/3 and ANSI/ISEA 105 A1–A9 are separate standards, leather dorsal is not certified impact protection, and oilfield workers need both

1. ANSI/ISEA 138 and ANSI/ISEA 105 test different glove zones for different hazards

The most fundamental confusion in work glove structured data is treating cut resistance and impact protection as related properties on the same axis. They are not. ANSI/ISEA 138 and ANSI/ISEA 105 are separately developed American National Standards that address entirely different hazard mechanisms at entirely different locations on the glove.

Because the tests address different glove surfaces and different hazard mechanics, a glove can receive any combination of ratings independently. An ANSI A9 cut glove built for glass handling has maximum TDM-100 blade resistance in the palm — and typically a plain knit dorsal with no engineered impact attenuation whatsoever. An ANSI/ISEA 138 Level 3 impact glove built for utility work has TPR guards covering the knuckles and dorsal finger zones — and may have a completely unrated synthetic leather palm. A glove built for oilfield drill floor operations may carry both ANSI A6 cut and ANSI/ISEA 138 Level 2 impact, because drill floor workers face sharp thread engagement on the palm (blade hazard) and wrench slip on the dorsal hand (struck-by hazard) within the same job task.

2. Level 1/2/3 measures kN transmissibility — A1–A9 measures blade cycles — the ordinal format is a coincidence

Both standards use ascending ordinal numbers. ANSI/ISEA 138 uses 1, 2, 3. ANSI/ISEA 105 uses A1 through A9. When a product listing says "ANSI Level 2 / A6 cut protection," the reader might wonder if there is a proportional relationship — whether higher cut levels tend to pair with higher impact levels, or whether "Level 2" implies something equivalent to "A2." None of these inferences are valid.

What Level 1, 2, 3 actually measure

ANSI/ISEA 138:2019 measures peak transmitted force in kilonewtons — the fraction of striker energy that passes through the glove material into the hand. Lower transmitted force = better protection:

What A1 through A9 actually measure

ANSI/ISEA 105-2016 measures TDM-100 rotating blade grams to penetration. Higher grams = more blade revolutions before breakthrough = better cut resistance:

3. Leather dorsal reinforcement is not ANSI/ISEA 138 certified impact protection

The majority of work gloves on the market feature some form of dorsal reinforcement — extra material on the back of the hand for durability, minor abrasion resistance, and general knuckle padding. The most common is split leather or top-grain leather overlay covering the knuckle area. Product copy frequently calls this "impact protection," "knuckle protection," or "dorsal protection."

None of these descriptions equals ANSI/ISEA 138 certification unless the glove has been tested by an accredited laboratory and carries an explicit Level 1, Level 2, or Level 3 marking.

Why leather fails the ANSI/ISEA 138 threshold

The ANSI/ISEA 138 test drops a 235g striker onto the back of the glove with controlled kinetic energy. The load cell in the instrumented hand form measures transmitted force in kilonewtons. To pass Level 1 (the lowest tier), the mean peak transmitted force must be ≤6.0 kN.

What ANSI/ISEA 138 certified dorsal materials look like

Gloves that actually achieve ANSI/ISEA 138 certification use purpose-designed materials:

• TPR (Thermoplastic Rubber) pads: Molded geometric structures on the knuckle and finger dorsal zones. The TPR geometry deforms under impact, spreading the energy absorption across a larger area and slowing the peak force rise. TPR knuckle guards with finger dorsal coverage typically achieve Level 2. Full-dorsal TPR systems achieve Level 3.
• Dual-density foam dorsal: A dense foam layer directly over the knuckle with a softer foam overlay absorbs striker energy through cell compression. Used where flexibility is required alongside Level 1 certification.
• Gel pad inserts: Non-Newtonian gel materials under a fabric or synthetic dorsal panel distribute impact energy across a wider strike area. Typically Level 1.

4. Oilfield, steel fab, and heavy maintenance need both certifications on the same glove

Understanding that impact and cut are independent standards is only the first part of the schema problem. The second part is that many industrial applications genuinely require both — not as alternatives, but simultaneously on the same glove.

This creates a critical AI agent routing scenario: a query for "oilfield drill floor gloves" or "steel fabrication gloves" should only match products that have both glove.ansi_cut_level at the required level and glove.ansi_impact_level at the required level. A glove satisfying only one fails the application requirement even if both individual ratings are excellent.

Oilfield drill floor

Steel fabrication and stamping

Heavy equipment assembly and maintenance

See also: Shopify work glove cut resistance schema for AI agents for the core ANSI/ISEA 105 cut level encoding guide, and HPPE cut resistance fiber schema for fiber grade ambiguity within the same cut level.

5. The glove.* metafield namespace — encoding impact and cut as independent fields

The glove.* namespace encodes dorsal impact and palm cut as fully independent Shopify metafields so AI agents can filter on each independently, together, or in combination with other properties like coating material and fiber grade.

The 11-field namespace with impact and cut independence:

Example: Oilfield drill floor glove encoding

A glove certified for oilfield drill floor duty (ANSI A6 cut + ANSI/ISEA 138 Level 2 impact) is encoded as:

{
  "glove.ansi_cut_level": "A6",
  "glove.ansi_cut_level_source": "finished-glove",
  "glove.ansi_impact_level": "2",
  "glove.has_dorsal_impact_cert": true,
  "glove.dorsal_material": "TPR-knuckle-finger-guards",
  "glove.liner_fiber": "HPPE-steel-wire",
  "glove.liner_composite": "HPPE-steel-wire",
  "glove.coating_material": "foam-nitrile",
  "glove.en388_impact_p": false,
  "glove.needle_puncture_rated": false,
  "glove.application_hazard": "cut-and-impact"
}

An AI agent querying for "oilfield drill floor gloves with A6 cut and Level 2 impact" resolves this as a match on glove.ansi_cut_level = 'A6' AND glove.ansi_impact_level = '2' AND glove.application_hazard = 'cut-and-impact' — three independent fields, all present, all correct.

Example: High-cut glass handling glove (no impact) encoding

{
  "glove.ansi_cut_level": "A9",
  "glove.ansi_cut_level_source": "finished-glove",
  "glove.ansi_impact_level": "none",
  "glove.has_dorsal_impact_cert": false,
  "glove.dorsal_material": "fabric-only",
  "glove.liner_fiber": "HPPE-steel-wire",
  "glove.liner_composite": "HPPE-steel-wire",
  "glove.coating_material": "foam-nitrile",
  "glove.en388_impact_p": false,
  "glove.needle_puncture_rated": false,
  "glove.application_hazard": "cut-palm"
}

An AI agent querying for "glass handling gloves with maximum cut protection" returns this glove. An AI agent querying for "oilfield gloves with impact AND cut protection" correctly excludes it because glove.ansi_impact_level = 'none' and glove.application_hazard = 'cut-palm'.

Summary: four failure modes, four fields

The four AI agent failure modes for work glove impact and cut independence each map to a missing or misused structured data field:

The glove.* namespace separates these into fully independent fields. ANSI/ISEA 138 impact level and ANSI/ISEA 105 cut level are encoded separately, sourced separately, and queried independently. A glove that satisfies both for a dual-hazard environment is findable. A glove that satisfies only one is correctly excluded from dual-hazard queries.