Some people age really well with time while others tend to get completely screwed over. It's not really fair but it is what it is.
This piece contains a small a tick of time, otherwise called a particle of a second. When a raw piece of time is contained like this, it tends to manipulate general time and sometimes even reverse it depending on just how much of it is stored up. This is enough to slow it down quite a bit but that is all. This results in an affect that causes you to appear younger over time.
With this piece, while exposed to the particle of time, you will find that you will physically age more slowly and you will likely even appear younger and more attractive to those around you. It will slowly get rid of general signs of old age as it bonds with you.