That was a great question as I didn't really know about the rain cover either. I am a Brooks B17 Imperial fan. I've put about 1500 miles + on one so far and it fits like a glove now. I did, however, purchase an additional tin of Proofide to have around and I dress it about every three months to 6 months. It does come with a little packet of proofide in the box.

- Cpt. Bob