Velvet-like, adhesive or non-adhesive backing choices allow black-out material to be applied to any acceptable surface. Flocked material surface characteristics are consistent across product line, but higher paper numbers indicate thicker, more durable levels of backing for the material. The #40 backing is paper-thin (0.01" thick), the #55 adhesive backing is thicker (0.02" thick), but still very flexible, and the #65 backing has a texture similar to heavy construction paper (0.02" thick). Note that material with non-adhesive backing will have a slightly duller (less reflective) finish than the adhesive backed flock material.
Note: This material is meant to absorb light and is not recommended for direct exposure to high power lasers.