It's gigantic, wraps tightlyvaround my waist to hips, with a thinner extension upwards to my shoulder blades area to prevent bending or twisting.

The usual BLT rule. No bending, lifting, or twisting. Right now my lifting is at 5 lbs MAX and preferably not more than 2 pounds. Also, no reaching overhead for anything, especially that weighs over a pound, which is consistent with my "forever" after-neck-fusion rule, so im used to that part.

I'm so surprised they'd want a CSF leak for your son. Obviously I dont know much about his condition or treatment. All I know about CSF leaks are the major danger to the spine and health of anyone with one, including brain damage.