Robert wrote.......

"I have found that even on bubble mailers it doesn't hurt to put extra tape on the flap"

I do this with every package I mail out (all in bubble wrapped envelopes)......I do it for another reason though. It is very easy to open one of those envelopes without someone knowing & check what is inside. With tape on the flap they can not do that without it being noticed by the person receiving the package.
Andy - Las Vegas