Read and submit reviews for the HydroSkin Pants.
The 0.5mm neoprene of this product adds warmth, so long as you aren't in the water too often or too long when the water (and/or air) is really cold. I've this thing many times in 32 degree water (and capsized), and been comfortable -- so long as you get up out of the water quickly -- easy for a surfski so long as the conditions aren't too bad.
I was delighted that this product was adequately long in length for me (am 6'2" tall). If this weren't adequately warm, the next step might be to wear a dry suit, or perhaps a semi-dry gore-tex paddling pants of some sort. I'm glad to have this as part of my kit.