MCR Safety MU3664K-XS Mustang HiDex Goatskin Kevlar FR Gloves — X-Small

The MCR Safety MU3664K-XS Mustang HiDex Goatskin Kevlar FR Gloves — X-Small (SKU: MU3664K-XS) represent a critical inclusion in any comprehensive FR hand protection program. X-Small is the least commonly stocked size in industrial PPE — and that gap in supply is exactly where workplace injuries happen. Workers with smaller hands who are issued oversized gloves experience reduced grip strength, impaired dexterity, and increased likelihood of removing the glove for precision tasks. The MU3664K-XS closes that gap, delivering genuine goatskin leather palm construction and a Kevlar liner for flame resistance and cut protection in the smallest available size of the Mustang HiDex series.

Key Features

• Genuine goatskin leather palm — premium, tight-grain, naturally supple protection
• Kevlar liner provides inherent flame resistance and ANSI-rated cut protection
• Drivers glove construction — unlined back for flexibility and breathability
• HiDex platform engineered for maximum dexterity within the protection category
• ANSI/ISEA 105 cut resistance from Kevlar fiber construction
• FR performance — Kevlar will not ignite, melt, or drip under flame exposure
• Keystone and wing thumb placement for natural, comfortable hand positioning
• Size: X-Small — smallest available size in the Mustang HiDex Kevlar FR line
• Addresses the persistent PPE gap for workers with the smallest hand dimensions
• MCR Safety SKU: MU3664K-XS

Detailed Description

X-Small is routinely absent from industrial PPE stockrooms, and this omission carries real safety consequences. When a worker with X-Small hands is given a Small or Medium glove, the excess material at the fingertips reduces tactile feedback and increases the chance the glove catches on machinery or equipment. In trades requiring FR-rated hand protection — welding, electrical, oil and gas, petrochemical — an ill-fitting glove is not merely uncomfortable. It can interfere with grip on valve handles, reduce the precision needed for torch operations, and create a snag hazard near rotating equipment. The MU3664K-XS eliminates these risks for the workers who need this size.

The construction of the MU3664K-XS mirrors the entire Mustang HiDex Kevlar FR series: a genuine goatskin leather palm that is the first line of defense against abrasion, cuts, and contact heat, and a Kevlar liner that adds the FR and cut-resistant properties that make this glove a multi-hazard solution. Goatskin leather is chosen specifically for its tight grain, which produces a thinner, more dexterous protective layer compared to cowhide split leather. In the X-Small size, where hand dimensions are already compact, the low-bulk character of goatskin is especially important — the resulting glove feels close to the hand and responsive rather than padded and imprecise.

Kevlar is not merely a marketing term in this context. DuPont's para-aramid fiber has an established performance record in protective textiles. Its key properties for this application are thermal stability (it does not melt or produce burning droplets), inherent flame resistance (it chars rather than burns), and high tensile strength relative to its weight (it resists cutting forces from sharp edges). In the MU3664K-XS, these properties translate to a glove that protects against the laceration hazards of sharp metal, glass, and sheet material, and the flash fire or torch flame hazards of welding and cutting environments.

The HiDex name reflects MCR Safety's design philosophy for this series: high dexterity is not a secondary consideration, it is a primary engineering objective. In a traditional fully lined safety glove, the back of the hand is encased in liner material that restricts bending at the knuckles and reduces the hand's natural range of motion. The drivers glove format used in the MU3664K-XS leaves the back unlined, preserving the hand's ability to cup, grip, and flex naturally. For X-Small hands already adapted to fine work — often the hands of workers who gravitate toward precision trades — this design choice makes the glove a tool rather than an obstacle.

Safety managers responsible for inclusive PPE programs should note that the MU3664K-XS is not a specialty or niche product — it is the correct size for a real segment of your workforce. Whether that includes apprentice workers, women in trades, or simply employees who have always made do with ill-fitting gloves, stocking the XS size is a straightforward way to demonstrate that your hand protection program is built for the actual people doing the work.

Applications and Use Cases

• Workers with X-Small hand dimensions requiring properly fitting FR and cut-resistant gloves
• Women in welding, electrical, and oil and gas trades with smaller hand proportions
• Apprenticeship and training programs fitting new workers with correctly sized PPE
• Inclusive PPE programs replacing one-size-fits-most with properly fitted protection
• Precision welding and torch work requiring dexterous FR gloves in smaller sizes
• Electrical utility work where FR compliance must extend to all crew members
• Petrochemical and refinery work with flash fire hazards affecting diverse workforces
• Oil and gas field operations with mixed-gender and varied-size workforce teams
• Industrial maintenance requiring multi-hazard (FR + cut) protection for all employees
• Safety programs auditing PPE fit compliance across the full workforce

Specifications

Related Products

• Shop All Cut-Resistant Gloves — Full range of ANSI-rated cut protection gloves including small sizes
• Work Gloves Collection — Work gloves for all trades and hand sizes
• Impact-Resistant Gloves — Dorsal protection for heavy industrial and field environments
• All MCR Safety Products — Browse the complete MCR Safety product range at WC Safety
• Mechanics Gloves — Dexterous mechanics gloves for assembly and precision work

FAQ

Who typically needs X-Small gloves in an industrial workplace?

X-Small gloves are appropriate for workers with hand circumferences of approximately 6.5 to 7.5 inches. This includes many women in trades, some younger or smaller-statured workers, and any employee who has previously been issued Small gloves that felt too large. Proper fit is a safety requirement, not just a comfort preference.

Does the MU3664K-XS provide the same FR rating as larger sizes in the series?

Yes. The FR performance comes from the Kevlar liner material, which has the same inherent flame-resistant properties regardless of glove size. The protective material specifications are identical across all sizes in the MU3664K series.

Why is X-Small so often out of stock at safety distributors?

X-Small is historically underordered because procurement decisions are often made based on a majority male workforce. As trade workforces diversify and more organizations audit PPE fit compliance, demand for XS sizes has increased. WC Safety maintains stock of the MU3664K-XS — contact us for current availability and volume pricing.

What are the safety risks of issuing an oversized glove to a worker who needs XS?

Oversized gloves present documented hazards: excess material reduces tactile feedback; loose backs can snag on equipment; workers remove ill-fitting gloves for precision tasks, creating unprotected windows for injury. In FR applications, a glove that is too large may shift during flash fire exposure, leaving portions of the hand uncovered.

Can I order the MU3664K-XS in bulk quantities?

Yes. WC Safety supports bulk B2B orders of the MU3664K series including the XS size. Contact our team for volume pricing, lead times, and to discuss mixed-size orders across XS, S, M, and L.

How does X-Small sizing compare to typical consumer glove sizing?

X-Small in the MCR Safety industrial scale corresponds to approximately 6.5–7.5 inch palm circumference, which is smaller than a typical consumer 'small' glove and is designed for the tightest end of the adult hand size distribution.

Does poor glove fit affect OSHA compliance?

Yes. OSHA 29 CFR 1910.138 requires that hand protection be selected and fit based on the work performed and the hazards present. PPE that does not fit the employee is not considered adequate protection, and employers who issue only larger sizes to a workforce that includes XS-hand workers may be non-compliant.

What is the next size up from MU3664K-XS in the Mustang HiDex series?

The next size up is Small (MU3664K-S), followed by Medium (MU3664K-M) and Large (MU3664K-L). All sizes use the same goatskin leather and Kevlar liner construction. WC Safety stocks all available sizes in the line.