PEAKfresh is a mineral-impregnated polyethylene film that breathes. It has excellent permeability and good deodorizing properties, but its most important benefit is the ability to remove damaging ethylene gas.
Potted plants and freshly harvested flowers fall into the same category as far as damage from ethylene is concerned, and both have the same problems of wilting as a result of moisture loss. One important difference is that if a potted plant, such as a poinsettia, suffers damaged leaves and petals during either packaging or shipping, then the damaged leaves or petals will create excessive amounts of ethylene resulting in either the death of the plant or visual damage to leaves and petals. In the case of cut flowers, there is a high possibility that the formed bud will not open to full maturity.
Using ordinary polyethylene sleeves or sheets will maintain a high level of moisture because they prevent the transpired water vapor from escaping the packaged environment. Unfortunately, though, they will also produce levels of carbon dioxide and more importantly, ethylene - both of which are damaging in high quantities to potted plants and fresh flowers.