AIREX Fitline Mat 100 AIREX® Fitline mats are the ultimate choice for sports and training, used by countless top athletes in the world. Order Yours Today! AIREX® Fitline mats are the ultimate choice for sports and training, used by countless top athletes in the world. The Fitline is a classic fitness mat and is often used in group fitness classes in gyms or gyms. As a small, lightweight and trendy training mat, the AIREX® Fitline is also the perfect gymnastics mat for at home and “on the go” and an ideal match for any sports bag.