Your selection of goggles for swimrun should start with looking at a pair which have been designed for open water swimming (OWS). Goggles are a very personal choice and its worth investing time in training to find a pair which suit you. We have seen all sorts of goggles used in swimrun; full face masks and even the occasional goggles and snorkel setup! It really is about finding a pair which works for you.
Polarised goggles are great if the sun is out but a clear pair could be better on darker rainy days.