MyZone › MyZone MZ3 Chest Replacement Strap Image 1 of 1 MyZone MZ3 Chest Replacement Strap €15.99 Replace your lost or worn strap quickly and get back to your routine with confidence. Standard: Fits 24.4 - 34.6" Add To Cart Added! Replace your lost or worn strap quickly and get back to your routine with confidence. Standard: Fits 24.4 - 34.6"