I don't think I'd put anything valuable in clear plastic myself. I do buy cheap gallon ziplocs for the inside to help and between reinforcing it, I've never had a complaint,in fact, I've gotten some tape queen comments, but that's ok, my stuff gets there. Sending overseas, I don't know. I get some of my meds in tyvek envelopes and I do reuse those also, tho pulling the labels off is a bear.