Material:EVA Green,Blue,Purple,Pink Size: Specifications: 173 60 0.4cm The package size is 60cm long Diameter of about 7-8cm Dark green,Yellow,Orange,Black Size: Thickness:4mm Size:173x60x0.4cm 68.1x23.6x0.4 Length:173x60cm 68.1x23.6 Capacity:56-75L Product description: Comfortable chest strap for heart rate measurement compatible with Polar, Wahoo, Garmin products. The smart fusion of soft fabrics and adaptive electrodes make it extremely sensitive to your heart s electrical signals, so the heart rate sensor can pick up your heart rate quicker and more accurately. Being an indispensable part of heart rate monitor, it will detect and send your real-time heart rate to the smart phone accurately. This light garment is compatible with all heart rate sensors ANT+, Bluetooth 4.0, 5.3K . With the chest strap based on high quality material, it can be attached to your skin closely. The most popular heart rate belt in the world easy to use yet is very durable. Utilizes the snap attachment method.