That's the downside of neoprene. Its hot when you're dry, so it can be a problem when the air temps are fairly warm, but the water is still cold. Take it off and you dont have the protection if you swim. Those guys that were cold in drysuits, were cold, but wouldn't get much colder swimming. I dont own a drysuit, just what I am figuring out about wetsuits. I wear a FJ and drytop in my kayak, and my legs cook unless I swim. Luckily, I'm pretty new at this, so lets just say I probably wont overheat anytime soon.