Warrior, get away from using the term " safety belt". They had their day and that day is past. There are any number of fall restraint harnesses available that will actually save your life should you fall, and if used correctly, can assist you greatly in accessing a tree and in safely hanging your gear. They have gotten better and more comfortable and even more user friendly. I still use Seat of the Pants cause that is what was available when this change over started. As above, there are many versions available.
Cost used to be a huge issue, and still is to some. I have spent time hanging from safety belts and harnesses, my own choice, in training young hunters. I believe I have experience that few others here have regarding this. I believe you should purchase a good fall restraint devise based upon its quality, its features and its ease of use to you. Only at that point that you have chosen based on those criterion should you look at the price tag.
Even a short fall can kill you or screw you up a bunch. Why do we always risk it all because a "safety belt" is only $15 and a harness is $85 dollars ? I think it is because we just don't know what will happen if we fall and believe in the best.
I do. . . . wear the harness, every time.
ChuckC