SOLAS tapes are have a reflective surface comprised of encapsulated glass lens beadlets.
This tape (3150A) is highly flexible and adheres to rubber-coated cloth, vinyl-nylon laminated cloth, cured polyester cloth, PVC, aluminum, and helmets.
Approximate thickness of 3150A is 11-mils (0.011″) and 6755 is 13-mils.

3/4" x 66' Colour Coding Vinyl (Harness) Tape - Red
1" 3M 8830 Adhesive Reflective Film Tape - Silver 

