PERFECT DESIGN - The Mars Wellness AirMini Filter Kit was designed to be a perfect fit for the Resmed AirMini CPAP Machine, no need to trim to size.PREMIUM MATERIAL - The Mars Wellness AirMini Filter Kit is made of premium quality materials right here int he USA, never compromising on quality.FILTERS THAT WORK - Our filters were designed to ensure that you and your loved ones are provided with the cleanest air to maintain the health of your lungs.PERFECT FILTRATION - Our hypoallergenic filters effectively stop particles and dirt from entering your machine and compromising the quality of your life.100% MONEY BACK GUARANTEE - The Mars Wellness promise is to provide quality products and customer service at all times. If for any reason you are not satisfied please reach out to us right away, no questions asked.