Although it's listed as F size, it's suitable for sizes M and up, including plus sizes. Or rather, it might be designed with enough width to accommodate a small backpack. I often use a bicycle, so I also have a rain poncho, and I've decided to consolidate to just that. I made the bag myself. The color didn't come out properly in the photos today, as it was a sunny day, but it's a calm, moss green. It's convenient for those who commute or go to school by bicycle, as you can wear a light backpack underneath.