To test which materials grip well, you need something heavy, such as a brick, and some materials to slide, such as a carpet, a rubber sheet and a sheet of plastic.

Cut out a piece of material and wrap it around the brick, holding it in place with a rubber band as the diagram on the main screen shows.

Use a forcemeter to pull it over a desk. Note the forcemeter result.

Repeat with the other materials to see which grips best (and so has the highest forcemeter reading).