The purpose of "boot" repair is to temporarily fix a tear in the tire rubber of sidewall. This is necessary to prevent the tube from poking through the hole once it is inflated

Any heavy, abrasion-resistant, not-stretch fabric is good for this (canvas or heavy denim)

For a makeshift roadside repair you can use cloth tape, pieces of cardboard or a large rubber patch - anything to get you home

Tire boot must completely overlap rip to be effective

Wipe clean the inside of the tire adjacent to rip

Use glue on both surfaces and work from the inside of the tire; attach boot to wet glue

Align patch so edges do not extend beyond tire bead