I am a diver, yet I always rent my wetsuits. I have been thinking of making an investment recently, but I haven't gotten around to it, as in Belgium you need some different thicknesses: 7mm (for sure, even two perhaps), 3mm for indoor and on trips, a warm undersuit for the body, etc.
I am living in San Sebastian for 2 months, and I would love to buy a triahlon swimsuit 2mm (like this one) or 3-4mm (like this one) to be able to go out for longer swims in the ocean. I can't swim with a diving suit I suppose, because of the inflexible arms, and I am considering doing triathlons for fun. Not sure which one would be confortable with water temps around 16 degrees C.
Would I also be able to wear the triathlon suit to go diving? Or do they have significant changes that I am not aware of? I guess they are less insolating around the flexible parts, would that be a problem?