Airtrim Racing-2 filters (2pcs)

Astma/sport filter is for easy trainings or all activities in cold conditions (heat up the cold air the most, filter is the tightest)
number 1 Racing filter is for easy trainings
number 2 Racing filter is for medium intesity trainings
number 3 filter is for the fastest and hardest trainings to get enough air. (heats up the cold air the least, has bigger holes in the filter)

All filters can be bought as spare parts. The Racing filters 1, 2 and 3 provides lower air resistance and
lower humidity and heat. No 3 have the least air resistance and warmth. If you suffer from asthma, coldinduced
asthma, angina or COPD we recommend you to use the asthma filter. It is the filter that provides
most moisture and heat, and is not suited for hard training.