I've done 45 in a 2 piece 7mm, and was cold but could tolerate it.
Since buying my drysuit, I don't have much opportunity to test this since I will use my drysuit for pretty much anything under 60...Coldest I have done since getting my drysuit is 65 in Brazil with a 5mm and could feel the cold obviously, but was comfortable.
Since buying my drysuit, I don't have much opportunity to test this since I will use my drysuit for pretty much anything under 60...Coldest I have done since getting my drysuit is 65 in Brazil with a 5mm and could feel the cold obviously, but was comfortable.