VaporSeal™ features a hydrophobic, gas permeable membrane with a medical grade, non-cytotoxic adhesive. Features a hydrophobic, gas permeable membrane with a medical grade, non-cytotoxic adhesive The porous membrane consists of layers of heat welded rayon fibers Pore size from 10µm to 50µm Moisture vapor transmission rate = 4,200g/m2/24hr Easy-to-pierce with serological pipets and pipet tips for direct sample recovery