The Hamlet N99 PRO


  • Unique Lab tested British Military Filtration Technology filters almost 100% of pollution, gases, and bacteria and viruses.
  • Ideal for people at risk of respiratory diseases, living in or travelling to areas with high air pollution / smoke level
  • Presented in a slimline tin for storage, fashion friendly designs available in 5 sizes suitable for the whole family!

NOTE: Shipment to addresses in the 50 States of mainland USA only.

This product is currently out of stock and unavailable.

Sizing Guide


Cambridge Mask – The N99 Pro Mask

Cambridge Mask, Admiral, Respirator, wildfire maskCambridge Mask Pro is a fashion focused pollution masks that come in a range of patterns and 5 sizes to fit children and adults.

The filters used in Cambridge Mask Pro meet the N99 Standard (higher than N95). This is a US Government specification for pollution masks. The masks use a triple-layer filter which will protect from a range of airborne contaminants.


What’s In The Pro

mask specification

Filter With British Military Technology

The mask uses a unique triple filter system. The first layer catches larger pollution particles such as dust and PM10, followed by the Three-Ply Micro Particulate which stops nearly 100% of smaller particulate matter such as PM2.5 and PM3.0.

The inner filtration layer is made from a 100% pure activated carbon cloth, which was originally developed by the UK Ministry of Defence for chemical, biological, and nuclear warfare protection.

The carbon filter is also treated with silver to ensure almost 100% harmful pathogens are removed and killed. The unique filter system allows the Cambridge Mask to perform better and last longer.

Masks Performance Comparison

Cambridge Mask Pro Disposable Mask Surgical Mask
Fashion friendly
Suitable for children
More environmentally friendly long-lasting mask
Comes with tin for safe and easy carrying
Adjustable earloops
Blocks over 99% of viruses and bacteria
Filters gas pollutants such as Ozone and oxides
Mask filter life 200-300 hours (3-6 months) 8-10 hours 8-10 hours
Cost per hour of use (USD) $0.08c $0.23c $0.03c


The Mask that Protect Everyone

Cambridge Mask PRO is a fashionable pollution mask that comes in a range of patterns and 5 sizes to fit children and adults.

Our Pro Masks are the world’s most trusted anti-pollution mask, perfect for travel, especially to any big city with higher pollution. The masks have a wide range of uses and are often used by travellers, Cyclists, urban residents, respiratory disease sufferers and anyone wanting to reduce exposure to potentially harmful pollutants.

In addition, we do keep a Medical Consultant on retainer who has her own professional indemnity insurance, Dr Harriet Leyland, to give us some limited medical advice, making sure our masks are save for medical uses.

Long Last Filter and Washable Mask

The mask can be used for up to 340 hours depending on the level of pollution it is used in. For the average customer this is around 3-6 months of use.

The mask can be washed with soap and hot water, however keep in mind that this will not extend the life of the filters. For the details of our filter’s life time, check out our FAQ page.

Independently Tested Filter

Cambridge Masks have met a wide range of tests to ensure they are effective and safe to use for the whole family.

  • ✔Pass the American National Institute for Occupations Safety and Health (NIOSH) N99 filter requirements under 42 CFR Part 48 (tested by Nelson Labs USA)
  • ✔Certified as child safe under 14 U.S.C 1278a and CFR Parts 1370 1501 1500.53 and 1500.44 (Certified by Bay Area Testing Labs)
  • ✔EN149 standards for CE in the European Union (Certified by SAI Global and Apave Labs FR)
  • ✔Food and Drug Administration standards for Korea (testing in progress) and Thailand (testing complete and passed).
  • ✔99.6% viral filtration efficiency and 99.7% bacterial filtration efficiency (tested by Nelson Labs USA)



There are no reviews yet.

Be the first to review “The Hamlet N99 PRO”

Your email address will not be published. Required fields are marked *