potato cod
Contributor
That's all well and good, but it won't help much if there's wind and it's raining &/or you're getting spray from the small boat you're in. Then, you'll want a TruWest (or similar) big, fuzzy and waterproof jacket.
Yeah, I've never been out diving in rain (lightening often scares me inside), but can see the appeal of the TruWest in this case! A good fleece can stand up to wind and some boat spray, but not rain.