Hexoskin ships with one single strap. This strap is to be used only if you are recording low quality data. In most cases you probably don't need to wear it.
In case you do, wear the strap at chest level, there are loops that help you position it at the right place.
We also recommend that you wet your skin where the 3 electrodes make contact.
If you think the breathing data isn't good enough, try wearing the strap at the abdominal level.
If you need to wear both straps, contact us and we will ship you one.