Mylar is the DuPont brand for the transparent film that they developed using polyethalene terephthalate (PET). Mylar has is now a common name used for many different types of PET film. We offer this incredibly durable polyester film in a clear or translucent off-white version, and we print on 4 mil thickness. Film will not tear or lose shape over time. It is great for templates, engineered structures and products drawings, overlays, and more. Anytime you have project plans that you want to be able to see through or trace – Mylar is a great option! Please designate which type of film – translucent, or transparent when ordering.