【Compatibilit】The heart rate moniotr chest strap replacement fits for MYZONE MZ-3 & MZ-1 (Not Compatible with MZ-SWITCH) for seamless replacement. 【Adjustable Size】 between M:24.8~36.6" inch /63~93 cm. The Wearable size is larger than the adjustable size,streching more than 1.2times 【Easy to Use and Clean】 Features the same snap attachment method for easy application. Remember to remove the sensor transmitter before cleaning. Hand wash the soft strap and allow it to air dry naturally. 【Note】The package only includes 2 straps. Each is individually packaged. Please kindly check your heart rate monitor model and wearing size before placing an order. 【Name and Date Tag】It is simple to recognize and locate your own heart rate band while taking part in group activities or competitions without making mistakes. Alternatively, you can just jot down dates, results, etc. Rich Green Valley’s heart rate monitor chest strap is an adjustable replacement strap that is suitable for MYZONE MZ-3 and MZ-1. Specifications - Belt length : Adjustable wearing size between: Large---L:29.5-45.3" inch /75-115 cm Medium--M:24.8~36.6" inch /63~93 cm Small---S:19.7-25.6" inch /55-70 cm Material: Nylon and spandex. Color: Red & Black & Pink & Blue Features - Soft elastic strap provides a comfortable fit. Easy to use, clean, durable, highly efficient and stable. Soft fabrics and adaptive electrodes make it extremely sensitive to your heart's electrical signals. Instructions - Wet the sensors on the inside of the strap. Attach your heart rate monitor transmitter to the strap. Attach the strap around your chest. Make sure the monitor sits above the base of your chest bone. Package Included: 1 x chest belt strap (only strap not including transmitter)