If you get vapor-lock vac-seal bags they don't let any odor through. The pores in the bags are small enough that odor cannot break out.I have had zero issues using these bags. I even had packages sit for over a MONTH in a canada post depot (some going to US) and all but one went through, and I'm pretty sure that was just random canada post workers rifling through mail to find shit since they were making only a few hundred bucks a week on strike pay.