I used a Serfas waterproof saddle cover on my commuter. Not only did it protect from the elements, it also effectively camouflaged my Brooks Champion Flyer from the more than casual viewer. The black color of the cover blended into the black color of the Brooks' frame. Some of my friends were surprised that I actually had a Brooks saddle on the bike! In nicer weather and less theft prone areas, I could remove the cover.

https://www.serfas.com/shop/products...-saddle-cover/

I also used a security seat binder bolt from Bicyclecolts.com to have added security..

https://www.bicyclebolts.com/collect...ty-allen-bolts