Cervical cerclage

Had en emergency cervical cerclage last week since my internal OS opened and my cervix measured only 0.9 cms. now I am in 22 week.Heard that there are pregnancy belts available which provide support to the cervix and prevent further shortening of the cervix .Did anyone come across such a belt? Pls share ur experiences if u have come across or known about it and let me know the brand so that I can buy. Thanks in advance .