Webbing p. pr. & vb. n. : of Web

Webbing n. : A woven band of cotton or flax, used for reins, girths, bed bottoms, etc.

Example:
What is the Webbing for on the outside of tactical backpacks?

Taxonomy
webbing, Nylon webbing, cotton webbing, straps, pouches, free encyclopedia, Polyester, fittings, buckles, racing harnesses, bergen, belts, auto racing, extensions, adjusters, driver, stretches, helmet.

Defination from the web:
Webbing is a strong fabric woven as a flat strip or tube of varying width and fibers often used in place of rope. ... Modern webbing is often made from exceptionally high-strength material, such as Dyneema, Nylon, Polyester, and Kevlar. ...