if you're interested in head, neck & eye protection, I've been enjoying the features & benefits of this helmet cover, sporadically over the past few years
Taiga Cycle Helmet Rain Cover, Waterproof/breathable Cycling Hat
also very effective in wet snow
remember visibility can be greatly reduced for car drivers. I added reflective stripes to my rain jacket
I really like rain pants over waterproof shoes
Showers Pass Men's Waterproof Breathable Transit Cycling Pants