Airtrim Filters Asthma/Sports

These replacement filters improve the quality of the air you breathe during exercise. The set of 3 filters includes: 1 racing filter n°1, 1 racing filter n°2, 1 racing filter 3. The Racing n°3 filter offers the least heat and the greatest air permeability. It's ideal for people who train very hard while protecting their windpipe. If the weather is colder, between -10 and -15°C, you can opt for the Racing no. 2 filter, which offers a little more warmth. In very cold weather, you can use the Racing no. 1 filter, which offers the most warmth of all Racing filters.