G-Series Mask
G-Series Mask
G-Series Mask
G-Series Mask
G-Series Mask
G-Series Mask
G-Series Mask
G-Series Mask
G-Series Mask
G-Series Mask
G-Series Mask
G-Series Mask
G-Series Mask

Details

PLEASE PURCHASE EAR STRAPS SEPARATELY- Only Rainbow arrives with ear straps and head straps!!!!! The other colors masks only include a head strap.

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

No valve or vents


 

Sizing Note: 70% of customers prefer the G9 (Medium - Large) size

G-Series Mask

Reusable Mask

Each mask comes with:
Head Strap, 5 Filters, Ear Straps Sold Separately
Regular price $32.99
Unit price  per 
Shipping calculated at checkout.
Kids
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Details

PLEASE PURCHASE EAR STRAPS SEPARATELY- Only Rainbow arrives with ear straps and head straps!!!!! The other colors masks only include a head strap.

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

No valve or vents


 

Sizing Note: 70% of customers prefer the G9 (Medium - Large) size

Product Features
Replaceable 4ply filters. Lasts 32 hours of direct use.
Form-fitting silicone seal, comfortable & breathable
Easy to wipe down and clean. Dishwasher-safe
No fogging of glasses or professional eyewear
5 standard filters included in each mask order
Save 5x over 1 month compared to single-use masks

Disclaimer: In no event shall CastleGrade™ be liable for any direct, indirect, punitive, incidental, special consequential damages, to property or life, whatsoever arising out of or connected with the use or misuse of our products.

Please Note: No respirator can protect 100% against COVID-19 or other viruses. COVID-19 is not yet fully understood. We cannot and do not guarantee that our respirators will protect you against the Coronavirus.

Video Tutorials

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 mask

93%

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

Registrations

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


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 filter has recently been tested by Nelson Labs, Alpha Labs and SMQ Labs and has performed extraordinarily well.

The G-Series filter has been 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.

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 mask unfit for use by another customer. Thank you for understanding.