Storm Jacket Camera Coversare the fastest and easiest way to protect professional cameras andlenses from inclement weather conditions such as snow, sleet, wind,rain, sand, dust, and harmful UV rays.Storm Jackets can be put on or taken off in about 10 seconds, and storein their own provided pocket carrying case. Constructed from high-techAquaNylon fabric, Storm Jackets won't lose their water repellency andare rugged enough to withstand the rigors of professional use. A bungeecord locks both the front and the rear of the cover.Storm Jacket Pro covers have a Velcro opening at the bottom toaccommodate lens mounted tripods, monopods and manual lens focusing.The Regular Storm Jacket Small ForHandheld Lenses offers the same protective features but withoutthe velcro opening underneath. TheStorm Jacket Pro is not made in the small size.In picking your size, please measure your DSLR and lens with hood, andkeep in mind the use of teleconverters and extension tubes. We suggestyou be liberal in your measurements and move up to the next size if yousense a tight fit.To determine the best size, measurefrom the rear of your camera's body to the front of the lens hood:SMALL: Recommended forcamera/lens combos that are 8" (20cm) or lessMEDIUM: Recommended forcamera/lens combos that are 14" (35cm) or lessLARGE: Recommended forcamera/lens combos that are 20" (50cm) or lessXL: Recommended forcamera/lens combos that are 24" (60cm) or lessXXL: Recommended forcamera/lens combos that are 27" (68cm) or less