Foam like this works fairly well.
https://www.ebay.com/itm/332800181643
For better results use a fur cover like this.
https://www.ebay.com/itm/264616550148
Covers like this were designed for extreme wind conditions the foam did not work in. The longer the fake fur is the better (unless it gets in front of the lens). Do not buy a cover like this. Instead go to a fabric store and buy the minimum amount of fabric possible. You could also buy a used toy with long fur at a thrift shop to get the fur you need. Cut the fur down to size, use doublesided tape to hold it on. After awhile when the fur falls apart you can take it off and use a new small square to do it again and again.