The Mylar Foil Heat Sealable Bags are our family of double sided metallised mylar bags. The design is the perfect, light-weight solution to creating colorful sample packs! These are ideal for storing lotions, body scrubs and food products such as powders and dried food. The exterior coating of metallised mylar helps protect contents from UV and water vapor damage. The inside of the bags are also lined with a layer of mylar that permits heat sealing the bags for more security. Note: For best results, only impulse heat sealers are recommended to heat seal the bags.