How effective are drysuits? I feel the cold!

[Subcooled]

A drysuit is not meant to keep you warm.
It is meant to keep you dry.
A trilaminate drysuit alone, for example, would be horribly cold.

What you wear underneath the drysuits matters!!!
https://www.ursuit.com/en/underwear

 

[Storker]

Yeah, there's an odd-sounding saying about drysuit diving that "lead is warmth."

When you've been diving dry since your first cert, it isn't odd at all. It makes perfect sense.