AirTrim Replacement Filters Sport/Asthma sale2023 12 07 Race 1 is the highest

Race 1 is the highest resistance and warming of the race filters

Asthma and Racing filters available separately

but with a harder metal tip

Powder for poor gliding cold snow in freezing conditions

ergonomic fit

AirTrim Replacement Filters Sport/Asthma sale2023 12 07 Race 1 is the highestThere are five different models of filters which allow different volumes of airflow. This is a pack of 2 Sport Asthma filters. The Sport Filter was renamed in 2024 to the Sport Asthma filter and the Asthma filter has been discontinued. The Sport Asthma filter air flow was very similar to the Asthma filter. Sport Asthma Filter: Low to Medium airflow and resistance, warms air significantly and is used for light to moderate intensity exercise and those