Tamper Evident | Matte White Vista PCR Mylar Bags (Tear Notch) | 5in x 8.1in - 14g - 1000 CountPlain Matte White is one of the best colors to get Mylar bags in because it draws buyers' attention to the package. For storage, the bags come with a seal that makes them airtight and leak proof once sealed. They are also made with thick polyester resin to protect their contents through harsh storage conditions. The bags also come with a tear notch to make them convenient for users. In addition, once the bag is heat sealed, it becomes tamper evident