Sometimes called a disk jacket or disk sleeve, the disk envelope is a paper or plastic sheath. They store a 5.25-inch disk and its jacket. These were used because the 5.25" diskettes had unprotected areas that were vulnerable to dust, dirt, and hair when they were not in use.

Floppy drive terms, Label

  • Floppy drive help and support.
  • 5.25" Disk Sleeve Archive