my friend has given as gifts 2 for me and my hubby but iam using one one more left with me seriously guys it works like amazing my waist size came to 32 from 35 with a month by doing exercised with This belt I don't know what they kept in side but truly amazing.i asked my doctor and he said it's safe to use 15 to 30 min per day while exercising so if u want let me know there are so many online also but I don't know about their quality under that price but this is truly branded