We will start by setting the device in place on the torso.
To begin with, wrap the chest band (identified by the chest diagram on the buckle) around the middle of the chest (around 10cm lower than the collarbone), and snap the buckle together at the centre of the sternum. Adjust as necessary using the sliding clip – it should be snug but not uncomfortable.
Now take the blue strap and drape it across the left shoulder and slide one velcro end underneath the chest band, folding back up to affix back on itself up near the shoulder. The other end can drape loose down the back for now.