Orders usually ship within 4 days of receipt

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We are proud to have partnered with Lovely Bride to bring the G-Series Mask exclusively to their audience customized in a beautiful light pink color.


We love to support brands who are prioritizing the safety of their customers.

Stay safe. Wear a mask.

G Series Mask | Lovely Bride
G Series Mask | Lovely Bride
G Series Mask | Lovely Bride

Details

The CastleGrade™ G-Series Masks are reusable respirator masks designed for everyday use. The base of the mask is made from a lightweight silicone that forms to your face, leaving no marks and a tight seal. The mask is paired with a replaceable 4-ply filter that can be used for up to 32 hours of direct use or 1 week.

  • FDA Registered as N95 Respirator
  • Over 98% Filtration | NIOSH NaCl test by Nelson Labs (8.13.20)
  • 4 layers of filtering materials

  • Easily cleaned by wiping with disinfectant

  • Silicone seal for superior protection
  • No valves. Filters air in both directions inhale / exhale
  • Fits with glasses comfortably, no fog
  • Each mask comes with 5 filters
  • Filters last 32 hours of breathing time
    (or 1 week, whichever comes first)

G-Series Mask

Reusable Respirator Mask

Regular price $39.99
Unit price  per 

All sales are final.

Details

The CastleGrade™ G-Series Masks are reusable respirator masks designed for everyday use. The base of the mask is made from a lightweight silicone that forms to your face, leaving no marks and a tight seal. The mask is paired with a replaceable 4-ply filter that can be used for up to 32 hours of direct use or 1 week.

  • FDA Registered as N95 Respirator
  • Over 98% Filtration | NIOSH NaCl test by Nelson Labs (8.13.20)
  • 4 layers of filtering materials

  • Easily cleaned by wiping with disinfectant

  • Silicone seal for superior protection
  • No valves. Filters air in both directions inhale / exhale
  • Fits with glasses comfortably, no fog
  • Each mask comes with 5 filters
  • Filters last 32 hours of breathing time
    (or 1 week, whichever comes first)
CastleGrade Filter materials
Replaceable Filters

4 Protective Layers

Each G-Series Mask uses a replaceable 4-ply filter that has been tested to block microparticles at over 95% efficacy. The mask has no valves. Air is filtered in 2 directions, on both inhale and exhale.

Our filters are custom-fitted to the G-Series Masks and should be replaced either weekly or after 32 hours of direct use. When in use, the filter's blue side (PP Meltblown) should be facing in towards you.

Lab Tested Reuse for 32 hours Buy in Bulk
Nelson Labs USA (8.13.20)

Passed NaCl test

Average across 20 tests

Filtration Efficiency

98% Filtration

Must be 95% or greater

Particle Penetration

< 2% Penetration

Must be 5% or less

Sizing Guide

CastleGrade

Customers are loving the G-Series!

78%

of customers feel safer in the G-Series than in other masks

56%

of customers feel the mask is more comfortable than a standard N95

93%

of customers said reusability and eco-friendliness was a factor purchasing

Reusing The Mask

CastleGrade

How to Clean

The G-Series Masks are designed to be reusable everyday and can be easily cleaned. The base of the mask can be sterlized just by wiping it down with disinfectant and paper towel. It is durable and dishwasher-safe, and can also be cleaned by dipping in boiling water for 2-3 seconds.

CastleGrade
Submerge in boiling water for 2 sec
CastleGrade
Easily clean with disinfectant
CastleGrade
Dishwasher-safe and durable

Registrations

Click here to learn more

FDA Registration

View Registration

Provisional Patent

U.S. Patent & Trademark Office
  • CastleGrade makes superior masks that actually allow you to breathe comfortably and if you wear glasses they do not “fog up”.

    Martha Stewart

  • I received the G-Series. This will be the new standard for the medical industry. It feels like you are wearing a cloud compared to the other masks out there that leave us with daily damage to our skin.

    Dr. Lauren Becker DDS

Frequently asked questions

Entrepreneur and business owner Anna Grinvald invented an earlier version of the G-Series in December. Anna’s mother lives in a senior care center in Israel and complained about how typical masks were fogging up her glasses. Ron Grinvald, a former injection mold specialist for several parts on the NASA spacesuit worked with Anna and eventually Dan Castle, owner of Castle Brand Group to improve it. The G-Series has recently been tested by the FDA, Nelson Labs, Alpha Labs and SMQ Labs and has performed extraordinarily well. 

Yes, click here to view our registration on the official FDA website.

The G-Series filter has been lab tested by several third-party labs. Results from these tests have shown a level of filtration efficiency over 95% consistently, with Nelson Labs performing the Bacterial Filtration Efficiency (BFE) test which returned a 99.8% efficiency score. (N95 Masks are 95% BFE)

The G-Series Mask has been tested by several third party labs. Please click on the Science tab to learn more.

As a standard, we recommend purchasing the G9 size. The G8 size is recommended for teenagers and women with small head and face features (70pct of women prefer G9).

Remove the 4-ply filter and place it in the dishwasher. You can also submerge it in boiling water for 2 seconds. If you prefer to keep it clean throughout the day you can wipe it down with any disinfectant.

You can wear the mask for up to 1 week or 32 hours of direct use, before replacing the filter.

Wearing a high protective, silicone mask will slightly alter / muffle the sound of your voice.

We manufacture in several countries including Vietnam, Czech Republic, Germany and China.

Don’t! Keep the mask and buy replacement filters on our website when you are running low or sign up for the subscription so you never run out. We cringe seeing so many masks being discarded after just one day of usage and Mother Nature needs your help.

For safety purposes, once the product has shipped, we consider the respirator mask unfit for use by another customer. Thank you for understanding.