POWERBreathe EX1 - Light Resistance 1 locked-in heel and midfoot profile

locked-in heel and midfoot profile combined with a spacious toe box that allows your toes to splay naturally

From KARHU’s origin in 1916 to the launch of Saysky in 2013 – we’re now joining forces to show that running is about community and moving forward in the same direction

Dual-density PEBA foam

proprietary screen subscription

A reliable performance piece you’ll reach for season after season

POWERBreathe EX1 - Light Resistance 1 locked-in heel and midfoot profileThe POWERbreathe EX1 is a specialised Expiratory Muscle Training (EMT) device designed specifically to strengthen the muscles used for breathing out. Unlike the Classic and Plus models that focus on inhalation, the EX1 targets expiratory strength to improve cough force, speech volume, and airway clearance. This makes it an essential tool for singers and wind musicians seeking better breath control, athletes wanting to reduce expiratory muscle fatigue,