Gore Bike Wear Element Windstopper Softshell Bibtights - Black/Neon Yellow, Women's Size M, NWT.
Though this is a Medium, it fits a lot like a small from Rapha.
Full-length bib tights for cool (cold)-weather cycling
Gore Windstopper membrane seals out wind
Soft lining increases warmth retention
Zipper around the waist for easy bathroom stops
Hook closure at the chest to hold straps from moving
Zipper also at ankles for easy on/off