I have one these jackets and absolutely love it. The video points out all of the reasons. It makes it easier for me to have most of the things I need when I take a dog out to work, including a camera and phone. I live in San Antonio, so I use the summer vest all year, in the winter with a light jacket underneath. When a puppy needs to go outside in the middle of the night, I am very grateful to be able to quickly throw the vest on and know that I have what is needed. In hot weather I wet the vest to stay cooler. Great product; well described in this video.