Certified anti-bacterial anti-particle cotton masks, washable at 30° and re-usable up to 30 times. The fabric used to make them is a technological patent belonging to Gaap Technology OU and consists of pure cotton onto which innovative multi-layers of “carbon Nanoclusters NCN” are applied. These provide ultra-effective respiratory protection to protect the airways from exposure to dust particles and/or non-volatile liquid particles. They are the environmentally-friendly alternative to disposable surgical masks and are a Class 1 medical device tested and approved in accordance with Directive 93/42/EEC.