All-Weather Down Cover This cover can be used as a rain cover or a down cover separately, and combining the two transforms it into a winter cover. It's a convenient cover that can be used year-round, depending on the season and weather. It's also convenient for use on rainy days. I used it with an Ergobaby baby carrier and stroller, but my child has grown, and I won't be using it this winter, so I'm putting it up for sale.