
Originally Posted by
wallysurfr
it's called a 4/3 because of the thickness of the neoprene. But to answer your question yes, a new 3/2 with the newest technology (sealed/welded seems, high tech neo, etc.) is probably going to provide the same warmth as an older 4/3 (we're talking 8-10 year old technology) that isn't sealed and uses pretty standard neoprene. This is just my opinion as others will probably have differing opinions.
For example, let's take it back to the mid 90's. In certain areas of the northeast you would want a 6 mil for the winter. Nowadays in those same areas you can easily get away with a 5/4/3 that has decent technology and you will be warmer.
But the way the suits are described 3/2, 4/3 and 5/4/3 won't change. You will just be wearing your 3/2 further into the fall, your 4/3 further into the winter and you'll be getting out of your 5/4/3 earlier in the spring. Eventually if the R&D continues and the technology keeps going, 5 mils will be a thing of the past...