The Rainsleeve is a good cover for incidental rain or dust protection. They are easier to shoot with than covering your camera with a plastic bag and are really reasonable in price at about two for seven U.S. dollars (street price).
They are not the most sturdy covers. In fact, I wish that Optech made a cover twice as heavy and twice as sturdy and sold them at the twice the price; one for seven dollars. But they are perfect covers for my Southern California climate since we see really very little rain (This December is an exception).
The Rainsleeve is light enough and compact enough to have in your camera bag all the time. I made good use of one of these covers on a trip to the State of Utah. We had no rain but a lot of swirling dust.
They are big enough to cover my camera and 300mm f/3L IS lens and I did quite well with these covers on a ten day trip to Alaska. I used them when my cameras (I used a 30D and a 40D) had telephoto lenses mounted.
However, for longer term use, especially in climates with abundant rain; I prefer the KATA GDC Elements Cover E-702 Rain cover <
http://www.google.com/products/cata..._catalog_result&resnum=1&ct=result#ps-sellers >
Although, at around $40-50 U.S.D. street price, the Kata is more expensive than the Optech rainsleeves; it is a much sturdier cover. Your hands fit inside the Kata cover through a pair of sleeves with elastic cuffs. I used the Kata when I had my 17-55mm f/2.8 IS lens on a camera (which was most of the time). I shot pictures during a very rainy float plane fishing trip to a remote Alaskan lake with no worries regarding the safety of my camera.
