"The Lens Band is a simple yet effective device specifically designed for zoom lensesto ""stop"" the tendency for your lens to extend under its own weight when pointeddownwards (or collapse when pointed upwards), a phenomena otherwise known as ""ZOOM CREEP."" Lens Bands are made of high grade silicone rubber which easily stretches over any camera lens, fitting snugly over the zoom ring. Our ""One Size Fits All"" Lens Band will easily stretch to fit all zoom rings from 67mm up to 110mm in diameter (or 2 3/4in. up to 4 1/2in. in diameter). Lens Band are available in a variety of fun colors to choose from and offer a ""Lifetime Warranty Against Manufacturer's Defects or Breakage."" Here is how it works in 3 easy steps: Step 1: Take the Lens Band and stretch over lens. Step 2: Position it only on the ""zoom ring"" when not in use. Step 3: When you are ready to lock your zoom ring in place, simply slide half of your Lens Band over non-moving portion of the lens ""body."" This will cause enough friction to prevent the lens from shifting under it's own weight. Be sure the Lens Band does not interfere with your focus ring when locking your zoom ring. Here is a list of lenses currently using Lens Band: CANON: Canon 100mm, Canon 10-22mm, Canon 15-85mm, Canon 16-35mm, Canon 17-35mm, Canon 17-40mm, Canon 17-55mm, Canon 17-85mm, Canon 18-135mm, Canon 18-200mm, Canon 18-55mm, Canon 20-35mm, Canon 22-55mm, Canon"