removable pavement - marking sheet material incorporates a stretchable porous fibrous web , such as a nonwoven web of randomly distributed fibers , preferably embedded in a pressure - sensitive adhesive layer carried on a backing . the fibrous web comprises closely spaced durable weather - resistant fibers and exhibits good tear strength in any direction . the complete sheet material exhibits a high tensile strength and a low residual force after stretching , i . e ., a low force tending to retract the sheet material back to its prestretched dimensions .