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Tubular: most inflating foam sealants
With a close fit
While power measures your external output (watts)
Uninterrupted ventilation channels keep airflow consistent
the backpack provides certified protection while moving naturally with your body for all-day comfort
4iiii Viiiiva Heart Rate Monitor V200 Snow Helmets Tubular: most inflating foam sealants4iiii Viiiiva Heart Rate Monitor V200 Train smarter and track your performance with the 4iiii Viiiiva Heart Rate Monitor V200, a high precision chest strap designed for cyclists, runners, and endurance athletes. By measuring your heart rate (bpm) in real time, the Viiiiva reveals how your body responds to training, helping you optimise workouts, improve fitness, and manage recovery. When paired with a 4iiii Power Meter, the Viiiiva provides a complete
