It is a very lightweight jacket that fits my dogs well. The belly part is extremely stretchy and allows for a lot of wiggle room in size. It is not particularly warm- my dogs get hot easily and they are not very hot in this jacket. I would say that it is more of a fashion accessory jacket.
Giving a medium rating because the weather is too hot to know if i like it or not. It looks cute, hopeful my female danes will like wearing on their hikes