Comparing O2 Curve Respirator with the N95 masks, the O2 mask is more effective against airborne particles and is more ‘breathable.’ It has those gill-like opening, which properly seals the mask when the user inhales air. They only open up when he exhales air. This O2 Curve Respirator is better than the standard pollution protective masks, which may not be comfortable for everyone. This O2 Curve Respirator comes with an interchangeable shell that is available in numerous colors. It allows the user to pick the one that he likes or match it with the outfit if he wants. There is an electrostatic filter at the core of this respirator. It should be replaced whenever felt necessary. Usually, one filter protects for two weeks and then needs a refill. Instead of using a disposable mask every other day, the user can buy O2 Curve Respirator and change the filter whenever deemed necessary. This approach is more environmentally friendly and cost-effective.