xiSkiGuy
Contributor
I couldn't agree more, Soggy.Soggy:Frankly, that is horrible advice. Maybe someone overweight, working hard, with very short duration and no repetitive diving, or with an incredible cold tolerance could do a 75 F degree dive in a 1.5mm core warmer, but for most of the rest of the diving public, I would consider a 3-5mm full suit a minimum for this temp range. I have used a 7mm and a 3mm+5mm core warmer and was comfortable in both.
I'm forever hearing overweight or temperature tolerant divers saying, "I could do that dive in a t-shirt!" Well maybe you can do that dive, but not everybody can. Temperature tolerance and exposure protection needs are very personal and can vary greatly: My brother is in great shape with almost zero body fat and he had to wear a hooded vest for his pool session training and a 5mm fullsuit in Mexico (in the summer no less!). On those same Mexico dives I had a 0.5mm on and was comfortable, but I wouldn't presume to tell everybody to outfit themselves that way.
I frequently wear a 7mm in temps below 80F and I've never been too hot. I've gotten cold in a 7mm in 70F water while repetitive cave diving.