My German Shepherd always stays warms, except when she is wet and it is time for bed. I made her this quilt from scraps of DWR nylon, so that it is breathable yet water-resistant, and you can see that the edges are made of more waterproof Sil-Nylon. The underside is made of fleece. The quilt rolls up into the padding, and just fits into the Sil-Nylon waterproof bag. This just fits the bill for her, and she has always kept warm with it.