Shrink-wrap or shrink film, is a material made up of polymer plastic film. When heat is applied to this material it shrinks tightly over whatever it was covering. Shrink wrap is commonly used as an overwrap on many types of packaging like CDs, DVDs, cartons, books, beverage cans, large appliances, pallet loads, etc. It can be the primary covering for some foods such as cheese and meats. It is also used to cover boats after manufacture and for winter storage.

In shrink-wrapping, a film or bag is placed over the load and then heat is applied to shrink the film or bag. It allows irregular loads to be stabilized. It can be manual or automatic. Most shrink-wrap applications are being replaced by stretch-wrapping.

In stretch-wrapping, a film is wound around the load while the film is stretched. It allows irregular loads to be stabilized. It can be manual or automatic. As compared to shrink-wrapping, stretch-wrapping have lower material, labor, and energy costs.