I really like this idea, so here are a few comments:
I have edited your grammar in some places to make it read smoother.
SCP-4912 compels them to put it on and wear it.
This is pretty redundant. I would pick one description and get rid of the other.
Most of these preventions in crime will usually end up with the SCP-4912-A instance in a state of injury or death, due to the lack of protection other than SCP-4912 itself.
I suggest changing "preventions" to "attempted preventions" because I doubt the instances actually help stop any crime.
Also, there are some sentences that sound awkward and the clinical tone isn't the best. That being said, I really do like the basis of this scip and I hope it does well!