MCR Safety MU3664K-M Mustang HiDex Goatskin Kevlar FR Gloves — Medium

For workers with medium-sized hands operating in flame-risk and cut-hazard environments, the MCR Safety MU3664K-M Mustang HiDex Goatskin Kevlar FR Gloves — Medium (SKU: MU3664K-M) deliver the ideal combination of multi-hazard hand protection and task-critical dexterity. Medium is the most versatile sizing in the Mustang HiDex Kevlar FR line — fitting a broad cross-section of adult workers — and is frequently the first size safety managers stock in bulk for general workforce distribution. Built on MCR Safety's proven Mustang HiDex platform, the MU3664K-M pairs genuine goatskin leather with a Kevlar liner in a drivers-style construction that addresses both flame resistance and cut protection without the bulk that compromises productivity.

Key Features

• Genuine goatskin leather palm — tight grain, natural suppleness, excellent abrasion resistance
• Kevlar liner for inherent flame resistance (FR) and cut-level protection
• Drivers glove construction — unlined back promotes breathability and hand flexibility
• HiDex engineering for maximum tactile feedback on precision tasks
• ANSI/ISEA 105 cut resistance rating via Kevlar construction
• Flame resistant per applicable FR standards — Kevlar will not melt or drip
• Keystone thumb for reduced stress and improved gripping comfort
• Wing thumb placement for natural, anatomically correct positioning
• Size: Medium — versatile fit for the broadest range of adult worker hand sizes
• MCR Safety SKU: MU3664K-M

Detailed Description

Medium is statistically the most commonly ordered glove size in North American industrial workplaces, making the MU3664K-M a critical SKU for any safety procurement program. A glove in Medium fits comfortably on the widest range of adult hands, and safety managers building a standardized PPE kit will typically start with Medium as their baseline stock. The MU3664K-M delivers everything workers expect from a premium FR/cut-resistant glove: the protection they need, the fit that keeps the glove on the hand, and the dexterity that lets them do their job without removing it.

The palm is constructed from genuine goatskin leather — a material selected for industrial gloves because of its naturally tight grain structure that resists abrasion without requiring a thick build-up of material. Goatskin is noticeably softer and more pliable than cowhide or pigskin at comparable thicknesses, which is why it's the preferred choice when dexterity cannot be sacrificed. In the MU3664K-M, the goatskin palm is the primary protective interface between the worker's hand and workplace hazards including rough materials, sharp edges, and heat exposure.

The Kevlar liner adds the critical second dimension of protection. Para-aramid fibers like Kevlar are inherently flame resistant — they do not sustain combustion, melt, or produce burning droplets when exposed to flame. This is the defining quality that separates an FR glove from a heat-resistant glove: FR gloves are engineered for environments where the glove itself may be exposed to open flame or flash fire, not just contact with hot surfaces. The Kevlar also adds meaningful cut resistance, protecting against lacerations from sharp metal edges, glass, or utility knife blades that workers encounter in maintenance and fabrication settings.

The drivers glove architecture is a deliberate design choice, not a cost-cutting measure. By leaving the back of the hand unlined, MCR Safety preserves the hand's natural ability to flex and breathe. Workers wearing fully lined gloves in warm environments often remove them to cool off — creating an unprotected gap in their safety program. The HiDex drivers design keeps the glove on the hand by making it comfortable enough to wear continuously, which is the only way any glove can provide effective protection.

For safety managers, the MU3664K-M is an excellent candidate for standardization across a multi-trade workforce. A single SKU that covers flame resistance and cut protection simplifies inventory, procurement, and compliance documentation. WC Safety stocks the complete Mustang HiDex Kevlar FR line, so adding adjacent sizes to your order is straightforward when you're equipping workers with a range of hand dimensions.

Applications and Use Cases

• Multi-trade industrial maintenance where both FR and cut hazards are present
• Oil and gas production and pipeline operations requiring FR-compliant hand protection
• Electrical transmission and distribution utility work near arc flash
• TIG welding and precision torch operations demanding FR dexterity
• Petrochemical plant turnaround and shutdown projects
• Metal fabrication with grinding, cutting, and torch work
• General construction trades requiring FR PPE compliance
• Industrial facilities with flash fire risk in confined or enclosed areas
• Safety programs standardizing on a single multi-hazard glove SKU
• Rigging and lifting near heat sources or ignition hazards

Specifications

Related Products

• Shop All Cut-Resistant Gloves — ANSI-rated cut protection gloves across all protection levels
• Work Gloves Collection — Full range of general and specialty work gloves
• Impact-Resistant Gloves — Dorsal protection for heavy industrial environments
• All MCR Safety Products — Complete MCR Safety catalog at WC Safety
• Mechanics Gloves — High-dexterity options for mechanical and precision assembly work

FAQ

Why is Medium such a commonly ordered size for the MU3664K series?

Medium fits the widest statistical range of adult hands in North American workplaces. Safety managers building a standardized PPE program typically stock Medium as their default size, as it accommodates the majority of workers without requiring a fit test. It is also the size most frequently ordered for PPE kits, new hire packages, and general replenishment.

What makes goatskin leather better than other leather types for FR gloves?

Goatskin has a naturally tighter grain structure compared to cowhide or pigskin, which allows it to deliver abrasion resistance at a thinner profile. This means a goatskin glove can be more dexterous than an equivalently protective cowhide glove. In FR applications where maintaining tactile sensitivity is important — such as valve operation or instrumentation work — goatskin's thinness-to-durability ratio is a significant advantage.

Is the MU3664K-M suitable for arc flash protection?

The MU3664K-M provides flame resistance relevant in arc flash environments, but it is not an arc-rated electrical insulating glove. For work on energized equipment requiring NFPA 70E arc flash PPE, rubber insulating gloves with leather protectors are required. The MU3664K-M is appropriate for the thermal hazard component of arc flash PPE programs when used as part of a complete arc-rated ensemble.

How do I confirm Medium is the correct size before placing a bulk order?

Order a sample pair before committing to a bulk purchase. Medium typically fits hand circumferences of approximately 8.5 to 9.5 inches. For a workforce with varied hand sizes, ordering a size run to allow workers to self-select is a practical approach that reduces returns and improves compliance.

Can these gloves be washed?

Leather gloves should not be machine washed. Surface contamination can be spot-cleaned with a damp cloth and mild soap. Allow the gloves to air dry naturally; heat drying will cause the leather to stiffen and crack. For heavily contaminated gloves, replacement is typically more cost-effective than deep cleaning.

Does the MU3664K-M come in a vendor-managed inventory option?

WC Safety supports B2B customers with volume purchasing, account-based ordering, and recurring procurement. Contact our team to discuss inventory management options, volume pricing on the MU3664K series, and setting up a standing order for safety-critical glove replenishment.

What is the expected service life of the MU3664K-M under regular industrial use?

Service life depends heavily on use intensity and exposure conditions. In moderate industrial settings with daily wear, goatskin gloves typically provide several weeks to a few months of service. Inspect the palm and thumb saddle regularly — replace when leather thins noticeably or the Kevlar liner becomes visible through the outer material.

Are the MU3664K gloves NFPA 2112 certified?

Specific certification status should be verified on the current product label and MCR Safety's official documentation. Always verify current certifications before specifying for an FR PPE program, as certifications can be updated or revised by the manufacturer.