4"x6" Polyolefin Heat Seal Shrink Wrap Bags Breathable POFThese are perfect to wrap your soaps and still be able to smell through. Great for Bath Bombs, Handmade Soaps and more.These bags are smell through polyolefin 75 gauge shrink bags with a vent hole to prevent bag from busting while shrinking.Also food safe!These will either be shipped in a cardboard mailer or poly envelope.You will need a heat gun in order to shrink around your product. A hair dryer will not produce enough heat to do so. You can find an inexpensive on Amazon.