Name: KN95 Respirator Mask, 1 Each
Brand: United Scientific
SKU: MASK2-K95
Price: 6.40 USD
Availability: InStock

<h2 data-section-id="18n4bab" data-start="0" data-end="34">What are laboratory face masks?</h2>
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Disposable laboratory face masks are single-use personal protective equipment worn to create a physical barrier between the nose and mouth and the work environment, protecting against large droplets, splashes, and aerosol-generating procedures. They are manufactured in 3-ply or 4-ply non-woven polypropylene construction and rated under ASTM F2100 in three levels based on bacterial filtration efficiency (BFE), sub-micron particulate filtration efficiency (PFE), and fluid penetration resistance. For research and clinical labs, ASTM Level 1 masks cover general bench work; Level 2 and Level 3 are specified for procedures generating visible aerosols or liquid splashes, such as sample processing, centrifugation of open tubes, or working with volatile reagents.
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<h2 data-path-to-node="2">What you will find:</h2>
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Three-layer nonwoven laboratory masks for basic protection
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Disposable face masks for daily lab use
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Dust and particle filtration masks for clean handling areas
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Nose-clip fitted masks for improved sealing and comfort
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Lightweight breathable masks for long lab sessions
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Cleanroom-compatible masks for controlled environments
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Single-use PPE masks for contamination control workflows
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Lab-grade protective face masks for general safety needs
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<h2 data-section-id="19n6iba" data-start="1075" data-end="1113">How to choose laboratory face masks</h2>
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ASTM level
Level 1 (BFE &ge; 95%, fluid resistance 80 mmHg) is appropriate for general laboratory bench work with low splash risk. Level 2 (BFE &ge; 98%, 120 mmHg) suits moderate-aerosol environments including routine sample processing and clinical diagnostic workflows. Level 3 (BFE &ge; 98%, 160 mmHg) is specified for high-splash procedures &mdash; surgical environments, high-volume aerosol-generating workflows, and BSL-2 open-bench sample manipulation. For inhalation hazards, NIOSH N95 respirators are outside the surgical mask category entirely.
Construction: 3-ply vs 4-ply
3-ply masks consist of a spunbond polypropylene outer layer, a melt-blown filtration layer in the middle, and a soft inner comfort layer. 4-ply masks add an additional filtration layer to improve efficiency while maintaining similar comfort. The melt-blown layer is the key filter component that determines performance.
Fit: ear-loop vs tie
Ear-loop masks are commonly used in laboratory environments due to quick application and removal. Tie-back masks or headband-style masks provide a tighter facial seal and are preferred where reduced leakage around the edges is important, such as in cleaner or more controlled environments. Cleanroom-grade masks are often individually packaged to reduce contamination and lint generation.
Latex-free certification
Most laboratory face masks are naturally latex-free because they are made from polypropylene. However, ear-loop materials should still be confirmed as latex-free (usually polyester or spandex-based) when working in environments with latex allergy controls.
Nose wire
A built-in nose wire improves fit by shaping the mask around the bridge of the nose and also helps reduce fogging of safety eyewear. Some designs use plastic-coated wires for environments where metal exposure must be avoided.
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<h2 data-section-id="1fljvas" data-start="4051" data-end="4076">Specifications context</h2>
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ASTM F2100 defines performance requirements for medical masks, including bacterial filtration efficiency (ASTM F2101), particle filtration efficiency (ASTM F2299), and fluid resistance (ASTM F1862). Medical-grade masks intended for clinical use may require FDA 510(k) clearance depending on the application. As of 2026, ASTM Level 2 3-ply polypropylene masks remain the most widely used format in research and pharmaceutical laboratories for daily routine operations.
Stay focused on your work&mdash;let MBP help you choose masks that keep your environment clean and your process uninterrupted. <a href="https://mbpinc.net/contact-us">Contact our team today</a> for a personalized quote.

Masks

United Scientific

Key Specifications

KN95 Respirator Mask, 1 Each

The KN95 Respirator Mask by United Scientific is a disposable five-layer mask with two non-woven layers, two melt-blown layers and a hot air cotton layer. The manufacturer states a particle filtration efficiency of 95% or higher and a bacterial filtration efficiency of 99% or higher. A curved shape, soft ear loops and an adjustable nose bridge give a close fit for lab, stockroom and workplace use. Non-sterile and latex-free.