So light, you'll forget it's there Experience featherlight comfort and accurate heart rate tracking from your wrist on every run. At only 36 grams, Suunto Run is our lightest watch, designed for a sleek, minimalist fit, with a textile strap that stays snug for no distractions. Focus on your stride, not your wrist.Run longer, charge less Keep your eyes on your training goals, not your battery percentage. Suunto Run delivers up to 12 days battery life while tracking daily activity and sleep and up to 20 hours of training time with high-accuracy location tracking. A watch that s ready to go the distance, day after day.Train smarter and recover stronger with tailored insights Suunto Run tracks your training load, monitors your post-exercise heart rate, and measures your Training Stress Score (Tss) for crucial insights to take your runs to the next level.