I had a pair of neoprene waste waders custom made but with a soft sealing band around the top like the other kayak dry pants
the main differences are first they don't leak like the breathable material the so called dry pant use and the neoprene material insulates better
I only wear a set of thermals under them and some thin socks
these are very dry and I doubt would leak much even swimming in the surf zone
one of the big problems with my kayak is you sit in a bucket of water all day and the foot wells also fill with water ( my Lovigs use to have about a cup of water in each foot sock each trip ) being wet is also being cold - also it's fairly common to sit like on a surf board with my feet in the water which is quite stable even in some ugly seas
but I think these pants will be far to warm in the warmer months