Bottoms
Neoprene shorts and pants, for summer sessions where a full suit is too much and for layering underneath one when it is not enough.
Neoprene shorts are popular with wing foilers and warm-water kiters, giving you protection from the board and harness rub without the heat of a full suit. Longer neoprene pants extend the season a few weeks either side of summer when the water is cool but the air is warm.
Most run 1mm to 2mm. Combine with a neoprene top for a full separates setup that adapts to more conditions than a single suit ever will.