Replacement Chest Strap — breathable silicone strap for accurate heart rate tracking Why you need it Keeps heart rate data reliable: silicone construction and enhanced electrode transmission minimize signal loss so your monitor records accurate readings during workouts. Comfortable, secure fit: stretchable silicone fiber blend moves with your body while holding sensors firmly in place to prevent slipping or false readings. Durable for regular training: breathable design resists sweat buildup and maintains performance session after session. Key features Material: crafted from silicone with a stretchable silicone fiber blend for a balance of flexibility, comfort, and durability. Improved electrode contact: material and design enhance electrode transmission for stable heart rate tracking. Breathability: vents and flexible material reduce moisture buildup for greater comfort during long workouts. Adjustable fit: fits chest circumferences from 27.56 to 39.37 inches for a secure fit during a range of activities. Replacement compatibility: designed as a replacement chest strap suitable for various heart rate monitor models. Performance and use cases Running: keeps sensors in place during steady runs and interval sessions so you can train by heart rate zones without signal dropouts. Cycling: stays secure through rides and climbs, delivering consistent heart rate data for power and pacing analysis. intensity training and gym workouts: adapts to rapid movements and changes in body position, maintaining electrode contact during sprints, circuits, and weight sets. Who it's for Athletes, fitness enthusiasts, and outdoor adventurers who need stable, accurate heart rate measurements across running, cycling, and intensity activities. Specifications Material: silicone with stretchable silicone fiber blend Adjustable range: 27.56–39.37 inches Function: replacement chest strap that enhances electrode transmission for accurate heart rate tracking Reliable, comfortable, and built for active use — a practical replacement strap to keep your heart rate monitor performing as you train.