I swim four times a week.  Being low-impact, it's much easier on my joints than running
Interesting, I have been looking for an alternative to running with joint issues popping up. Can you tell me more about swimming?
My favorite type of swimming is outdoors in the cold using a dry suit.
Do you usually swim in a pool outdoors or open water?
Usually outdoors in the dry suit.  The big advantage that they have over a wet suit is they do not allow the water to get in.