Science

 
THE SCIENCE BEHIND THE MASK

The Next Era
 of Protective Masks

See what sets us apart from other masks.

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MAXIMUM PROTECTION

About the Filter

Our G-Series Masks use a 4-ply filter composed of 4 layers of filtration materials. The mask has no valves. When in use, the filter's blue side (PP Meltblown) should be facing in towards you.

The G-Series filter has been lab tested by several third-party labs. Results from these tests have shown a level of filtration efficiency score considerably higher than 95% across multiple lab tests.

NELSON LABS (8.13.20)

Passed NaCl Test

Filtration Efficiency

98% Filtration

Particle Penetration

< 2% Penetration

SUPERIOR SEAL

About the Mask

The CastleGrade G-Series Masks use a patent-pending design made from a soft, form-fitting silicone base. The mask forms a natural self-suction seal.

Toxicon

Sensitivity Test

Passed

Toxicon

Irritation Test

Passed

TOXICON

Biocompatibility

Passed

Reusable & Sustainable

Looking Forward For Solutions

Single-use plastics and protective gear is a problem. We strive to have our products truly embody a mindset of sustainability.



Our G-Series masks are reusable, thereby decreasing overall waste and minimizing the impact on our environment.

Food-grade silicone

Food-grade polycarbonate

4-Ply filter

Food-grade polycarbonate

Food-grade silicone

 
BIODEGRADABLE PACKAGING

The Stone Bag

Our G-Series Masks and Replaceable Filters come safely sealed and packaged in the CastleGrade™ “Stone Bag”. 
The packaging will completely biodegrade in 14 months and does not need to be recycled.

 
Safety & Comfort

What Sets Us Apart

The G-Series Masks offer a best-in-class level of protection, while providing a comfortable, reusable product that you can wear everyday.

Patent on Reusable Silicone Mask

USPTO Patent #10,974,084

Efficiently protects against microparticles

Tests have shown the filter has 95% efficiency

Soft, form-fitting design with high breathability

The silicone base allows for all-day comfort

Eco-friendly materials, reusable design

Reuse the mask daily, just change filters

Easily cleaned by
 wiping with disinfectant

Sterilized with boiling water or 75% alcohol

Mask fits with glasses comfortably, no fog

Wear without having your glasses fog up