What are wetsuits made of?

The wetsuit is a wonderful piece of equipment, enabling surfers and ocean-goers to spend long periods immersed in water temperatures that would otherwise be off-limits. But what are wetsuits made of, and where do the materials come from? Neoprene is typically the main ingredient in a wetsuit, but confusion reigns as to what neoprene. Veteran wetsuit-wearer Ben Mondy opens a can of worms and peers inside.
00:00 - What are wetsuits made of?
00:57 - Limestone neoprene vs. petrochemical neoprene
01:17 - Natural rubber wetsuits
01:50 - Recycled wetsuits?
Shop wetsuits from Surfdome:
Shop natural rubber wetsuits by Patagonia:

[@MrRobertFarr]

Yes, I listened.

[@collin9673]

Will 90% polyamide 10% alastane work similar? Neoprene is super expensive here

[@fractalnomics]

0:33 stores heat