For sale on eBay is a Joe Rocket 1 piece riding suit. Black and High Vis yellow/green.
I am not affiliated with this sale.
I have one of these suits. They are very nice, fully armored, WATER PROOF and has a full ankle to wrist quilted liner. I have worn mine in temps between 17*F to 75*F and never was uncomfortable. I highly recommend this for a 1 piece riding suit.
http://www.ebay.com/itm/Joe-Rocket-Survivor-Suit-XXL-hi-viz-black-worn-twice-/291541523893#ht_158wt_1153 (http://www.ebay.com/itm/Joe-Rocket-Survivor-Suit-XXL-hi-viz-black-worn-twice-/291541523893#ht_158wt_1153)
Here is a photo of me wearing mine at this years Central Rally.
(http://i119.photobucket.com/albums/o145/aviationfred/temporary_zpsl8p83ilx.jpg) (http://s119.photobucket.com/user/aviationfred/media/temporary_zpsl8p83ilx.jpg.html)
Fred