I don't know anything about wetsuits but I've contacted DeSoto about some of their products and they've been extremely helpful.
I can't imagine trying to swim in something that restricts my breathing -- I would panic. I hope you're able to find something that works for you and lets you breathe!
- Gray 2010 carbon WSD road bike, Rivet Independence saddle
- Red hardtail 26" aluminum mountain bike, Bontrager Evoke WSD saddle
- Royal blue 2018 aluminum gravel bike, Rivet Pearl saddle
Gone but not forgotten:
- Silver 2003 aluminum road bike
- Two awesome worn out Juliana saddles