Hi, I am looking to lighten up my travel lode. I was interested in either a non-neoprene type wetsuit , How in terms of warmth do they compare to my 3 mil scuba pro wetsuit? Will the require less weight or is it about the same? I am also interested if anyone has experience with body suites like Lava-core that say they are equivlent to 3 mil neoprene? I just dive tropical waters, and somewhat long in the tooth (older diver) Thanks, appreciate any input