Amazon Customer 3 Not a bad fit, but it hangs over our (male) doberman's butt just enough that it will get dirty if he does his business, so we have to flip it up. The chest is a little snug, but that's expected.Haven't had it out in the rain, but I highly doubt it's waterproof. I think many things labelled as "waterproof" in Japanese translate better to "water resistant."The material itself is also a little thin. The inside has a thin fleece (or fleece-like) lining. On colder days (10o and below), we'll use this on top of a light sweater, which seems to work well.The build quality is average, and the reflective strips work rather well. It would a five-star product if it was a little thicker and a little shorter.