KleenGuard Nemesis Safety Glasses Guide | Ansell | SOSCleanroom

KleenGuard Nemesis eyewear is best assessed as part of a complete eye-protection program. A worker might need a clear, high-transmission lens for detailed assembly; a fog-resistant clear model for use with a mask; a small frame to maintain proper peripheral coverage; or a polarized smoke lens for glare in exterior work. Those choices are not determined by appearance or frame color alone.

KleenGuard is the commercial safety-PPE brand and Nemesis the eyewear product family. Ansell completed its acquisition of Kimberly-Clark’s personal protective equipment business in July 2024. As a result, buyers may find historical Kimberly-Clark Professional, Jackson Safety or KleenGuard identifiers in older documents while current manufacturer references identify Ansell. The manufacturer product code remains an important purchasing cross-check.

Across many current Nemesis lines, Ansell describes lightweight polycarbonate lenses, wraparound geometry, a broad choice of lens tints, soft-touch temple interfaces, and a neck cord. Several full-size models use the patented Flex-Dry nosepiece to channel perspiration and reduce slippage. These are family-level features; special designs may differ.

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According to the manufacturer, many standard, VL and Small variants have an approximately 8.25 base curve in current literature. Older SKU sheets may report a base curve of 8.0. The Basic design is listed at 8.5. These are product-specific geometry references, not an interchangeable dimensional guarantee or a substitute for an actual fit assessment.

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Manufacturer basis: Ansell’s current Nemesis family sheets generally identify ANSI/ISEA Z87.1-2020 and the Z87+ high-velocity impact classification. Standards timeline: ANSI/ISEA Z87.1-2025 is the most recent published U.S. consensus standard as of this article’s research date. This does not automatically update an existing Nemesis SKU’s certification.

OSHA basis: The text of 29 CFR 1910.133 incorporates the 2010, 2003 and 1989(R1998) editions for eye and face protection, with an allowance for equipment demonstrated to be at least as effective. It would be inaccurate to state that OSHA already requires every employer to purchase eyewear marked to the 2025 edition. Employer hazard selection remains the controlling step.

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The precise applicable marking rules depend on the standard edition and type of protector. Buyers should request current product literature and inspect delivered lens/frame markings when certification is part of an EHS procurement specification. See the ANSI 2025 overview and OSHA legal text.

Visible-light transmission (VLT) describes the portion of visible light that reaches the eye through the lens. A high-VLT clear lens supports detailed indoor work; a low-VLT smoke lens attenuates substantial visible brightness. Fixed indoor/outdoor lenses occupy a middle range. A polarized lens preferentially reduces certain reflected glare; mirrored lenses reflect part of incoming light but are not inherently polarized.

Some SOSCleanroom SKU-specific product records provide optical numbers: Nemesis VL 29111 clear anti-fog: 89% VLT; VL 29112 indoor/outdoor: approximately 50% VLT; VL 25704 smoke: approximately 9% VLT; and VL 20473 IRUV shade 5: approximately 2% VLT. Those figures describe the cited SKUs, not every clear, smoke or shade-5 variant in the product family.

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Fogging occurs when moisture condenses on a relatively cool lens and scatters visible light. Mask exhaust, respiration, humidity, exertion and rapid transitions between conditioned and warm spaces can worsen it. Repeated removal of obscured eyewear also defeats consistent protection.

Ansell states that KleenVision premium anti-fog is engineered to deliver anti-fog performance 100 times greater than the ANSI/ISEA Z87.1-2020 “X” mark requirement and exceeds the historic EN 166 “N” fog-resistance test. This is a manufacturer-published laboratory performance claim, not an SOSCleanroom independent validation or a guarantee that the lens will never fog. The user should inspect the exact SKU’s stated coating.

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In independent trade coverage, MSC Industrial Supply’s Nemesis overview reports manufacturer commentary emphasizing how fogging, coating durability and wearer comfort affect use. It is useful practitioner context, not a substitute for an ANSI performance report.

• During selection: compare the actual humidity and face-covering conditions; do not infer premium coating from a tinted lens name.
• During cleaning: avoid abrasive dry rubbing and chemicals not approved for the coating; verify the current instructions.
• During service: fogging that repeatedly obscures vision should trigger a fit, ventilation, cleaning, coating or PPE selection review—not removal of protection in the hazard area.

Nemesis is known for its lightweight sport-wrap frame, soft temple contact points and sweat-management design. Comfort may help workers keep protection in place; however, marketing language such as “all-day comfort” does not replace an individual trial. Fit should be verified with the worker’s other assigned PPE.

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These direct links connect the educational guidance to SOSCleanroom product pages examined during article research. They do not constitute an availability guarantee. The product pages listed below use a customer selling unit of 12 pairs per case, subject to the active ordering options on each product page. Other manufacturer package quantities—including Nemesis Readers—can differ.

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Browse more via SOSCleanroom safety-glasses categories, Ansell at SOSCleanroom, or the Technical Vault library. Manufacturer options that are described in the educational sections but not linked in this table should not be assumed in stock or actively listed.

Nemesis is generally marketed by Ansell as industrial safety PPE. A lens’s Z87+ rating says nothing about sterile status, particle shedding, nonvolatile residue, ion extractables, extractable contamination, autoclave compatibility or suitability for a particular ISO-classified room. The fact that SOSCleanroom sells a model does not mean that model has been qualified for every cleanroom application.

Suggested controlled-area evaluation sequence

1. Define the zone: record room classification, permitted materials, and the required eye-protection hazard assessment.
2. Review SKU evidence: request the current product datasheet, material information, packaging format and any available contamination or cleanability evidence.
3. Conduct a documented fit/cleanability trial: verify wearer compliance, fogging, approved cleaning, residue control and compatibility with the gowning ensemble.
4. Approve handling rules: specify incoming inspection, designated storage, don/doff location, cleaning frequency, segregation from uncontrolled areas and disposal.
5. Monitor and change-control: investigate repeated lens adjustments, scratches, damaged coatings, cleaning residue or material changes; review substitute SKUs rather than automatically treating them as equivalent.

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Do not assume that a cleanroom disinfectant, 70% IPA, solvent cleaner, bleach, hydrogen peroxide, autoclave cycle or ultrasonic cleaning protocol is approved for every Nemesis lens and frame. Seek the manufacturer’s current lens-care instructions before validating chemicals or sterilization processes. More cleaning is not automatically better if it degrades the lens coating.

Inspect more than the center of the lens. Deep lateral scratches, cracks at the bridge, weakened temple joints, poor alignment, damaged nosepieces or a compromised attachment can affect retention and coverage. Replace visibly damaged protectors rather than polishing, solvent-treating or attempting to repair lenses.

Recommended purchasing specification fields

• Manufacturer / current brand: Ansell / KleenGuard; family and exact manufacturer code.
• Lens description, visible-light transmission when needed, and presence/absence of KleenVision premium anti-fog or polarized construction.
• Required product-specific markings and applicable ANSI/CSA/other standard evidence, including the edition.
• Fit category (regular, Small, VL profile), headborne-PPE compatibility and any permitted accessories.
• Packaging and selling unit per current SOSCleanroom order option; do not confuse inner packs, cases and master shipping cartons.
• Required current documents, incoming-inspection criteria, replacement conditions and allowed substitute SKUs.
• Cleanroom handling, cleaning method and traceability requirements where relevant to the facility.

Total cost of ownership: what to measure

Unit cost is only one component of a program. For comparative field trials, record lost-time incidents from fogged vision, wearer complaints, scratches, number of replacements, cleaning effort, pressure points, and fit stability over the work shift. Such measurements are local operational indicators; no reliable published data establishes that one Nemesis lens saves a fixed percentage across every workplace.

Technical sourcing is stronger when the manufacturer’s claims are contrasted with other perspectives. The outside articles below illuminate factors such as comfort, lens selection and real-world wearability—but are not substitutes for model-specific test reports or workplace qualification.

• MSC: Upgrade Your PPE with Nemesis Glasses
• Bob Vila: Best Safety Glasses — Nemesis review
• Fisher Scientific: KleenGuard Nemesis variant catalog

Editorial synthesis: The most credible real-world rationale for Nemesis is the combination of proper fit, a useful tint for the actual task, available anti-fog performance and acceptable comfort. The most common selection mistake is buying the right “family” with the wrong lens or frame for the worker. This is a reasoned selection conclusion, not a published cross-industry performance ranking.

Sources are intentionally separated by authority. Product certifications and construction come from the current manufacturer or an exact product record; legal duties from OSHA; infectious-splash limitations from CDC/NIOSH; the standards edition from ANSI; and third-party articles from trade or review sources. Manufacturer and distributor pages may change without notice.

1. Ansell — standard Nemesis product-family page
   Primary manufacturer: frame geometry, UV, coating options, standards and product family
2. Ansell — Nemesis VL
   Primary manufacturer: frameless no-brow profile, impact and anti-fog
3. Ansell — Nemesis Small
   Primary manufacturer: fit system and small-frame features
4. Ansell — Nemesis Polarized
   Primary manufacturer: polarized optics and scratch resistance
5. Ansell — Nemesis CSA
   Primary manufacturer: CSA Z94.3:20 on CSA-designated models
6. Ansell — Nemesis Basic
   Primary manufacturer: Basic design and non-X anti-fog qualification
7. Ansell — Nemesis RX Readers
   Primary manufacturer: near-magnification and lens construction
8. Ansell — acquisition announcement, July 2024
   Primary corporate: current KleenGuard/Ansell identity
9. OSHA — 29 CFR 1910.133
   U.S. workplace eye/face protection legal requirements
10. OSHA — PPE assessment and selection
    Selection framework, other PPE interactions, splash vs spectacles
11. CDC/NIOSH — eye protection and infection control
    Glasses vs goggles for droplet/splash protection
12. ANSI — summary of Z87.1-2025
    Current edition and marking overview (not an Ansell SKU certificate)
13. MSC Industrial Supply — Nemesis overview
    Trade editorial / interview: fit, coatings, wearer issues
14. Bob Vila — safety-glasses review
    Configuration-specific reviewer impressions
15. Fisher Scientific — Nemesis catalog
    Independent distributor listing: numerous tint/coating variants

A best-fit Nemesis choice starts with the right hazard classification, then narrows by lens VLT, anti-fog requirement, fit profile and purchase specification. SOSCleanroom can help customers cross-check manufacturer codes, product documentation and available catalog configurations when comparing the family.

Questions about a specific model or documentation? Contact Sales@SOSsupply.com or call 800-443-7101.