The Technical Vault
By SOSCleanroom
Nemesis VL
Smoke Lens
VLT 9%
Frameless / No-Brow
ANSI Z87.1:2010
EN 166:2001 (CE)
Base Curve 8
Case Unit: 12
KleenGuard Nemesis VL (25704) — smoke-lens, frameless eyewear for bright-light work while maintaining a disciplined gowning mindset
Where this item fits (and where it does not)
Manufacturer code 25704 is a Nemesis VL smoke-lens variant listed at VLT 9% with impact-resistant polycarbonate construction.
Most often selected for bright-light environments where reduced visible light transmission is preferred.
In higher-grade aseptic cleanrooms, confirm whether your program requires sealed/sterile eye coverings (goggles) instead of non-sterile safety glasses.
Manufacturer-defined product identity
| Attribute |
Manufacturer listing (25704) |
Why it matters |
| Code / former code | 25704 / 3013538 | Supports receiving traceability and correct variant control. |
| Lens / VLT | Smoke / VLT 9% | Low VLT is typically preferred for bright-light conditions; confirm task visibility needs. |
| Frame/temples | Gun Metal; ratcheted temples | Fit stability reduces "adjustment frequency" (behavior + contamination driver). |
| Frame type / base curve | Frameless / base curve 8 | Wrap coverage and lighter weight can improve compliance. |
| Materials | Polycarbonate lens; nylon frame/temple; Empilon nosepiece | Material selection influences durability and cleaning compatibility. |
| Standards | ANSI Z87.1:2010; CE certified EN 166:2001 | Baseline compliance posture for eye protection selection. |
| UV protection | 99.9% UVA/UVB/UVC protection | Supports mixed-lighting work and general eye protection expectations. |
Contamination-control lens: eyewear as a "behavior control" tool
In controlled environments, contamination control often fails for simple reasons: operators adjust eyewear frequently, touch their face, and transfer contamination to gloves and garments.
A stable-fit, comfortable eyewear choice can reduce these failure modes, especially in support areas and gowning transitions.
Donning (gowning) guidance: ISO-first, then Annex 1 overlay
ISO approach: build repeatable operations control
- Stage before gowning begins: avoid carrying eyewear through uncontrolled areas once gowning steps start.
- Don by temples only: treat lens + face interface areas as "no touch."
- Integrate with hood/mask/veil: don in a repeatable order so fit is correct without repeated adjustments.
- Hands off after entry: if eyewear shifts or visibility becomes unsafe, follow SOP (often step out to correct).
European Annex 1 overlay:
Annex 1 expectations for Grade A/B include sterile masks and sterile eye coverings (e.g., goggles).
If your operation is Annex 1 governed, confirm whether this area requires sealed/sterile goggles rather than non-sterile safety glasses.
Common failure modes (how contamination happens)
- Frequent eyewear adjustment: drives face touching and glove contamination transfer.
- Unqualified cleaning chemistry: can haze polycarbonate or degrade parts; qualify your wipe-down method.
- Wrong lens for lighting: smoke lenses can reduce indoor visibility; align lens selection to task risk.
- Annex 1 mismatch: using safety glasses where sterile goggles are required creates compliance risk.
SOSCleanroom note about SOP's
The Technical Vault is written to help customers make informed contamination-control decisions and improve day-to-day handling technique. It is not your facility's Standard Operating Procedure (SOP), batch record, or validation protocol.
Use these best-practice suggestions to strengthen your SOPs—not to replace them.
Source basis (manufacturer-first)
SOSCleanroom is the source for this Technical Vault entry.
Briefed and approved by the SOSCleanroom (SOS) staff.
If you have any questions please email us at Sales@SOSsupply.com
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Last reviewed: May 1, 2026
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