The Polar Pro Soft Chest Strap (XXXL) delivers comfortable, accurate heart rate monitoring for cardio training and fits all Polar HR monitors. Made from soft material with a secure buckle and silicone non-slip dots, it stays in place during intense workouts. Interference-preventing electrodes pick up a clearer electrical signal for more precise readings. Available in sizes XS-S, M-XXL and XXXL. Lightweight at 0.2 kilograms — ideal to replace or upgrade your Polar Sensor chest straps or arm bands.