No matter how you feel about heart rate chest straps, the Polar H10 is one of the best around and we've learned to live with the squeeze.
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Polar H10 Training with built-in memory and Polar Beat
38% Polyamide, 29% Polyurethane, 20% Elastane, 13% Polyester Imported SUPREME ACCURACY: Widely recognized for its top precision by many sources, Polar
Polar H10 Heart Rate Monitor – ANT +
POLAR H10 Heart Rate Monitor, Bluetooth HRM Chest Strap - iPhone & Android Compatible, Black
Polar's new trail-friendly endurance running watch put the to the ultra test