The ultimate performance suit! The C-Zip ensures the best fit through the shoulders and gives extra stretch where you need it. Durable seams, isometric stretch and thermal rebound make this suit unbeatable in cold water conditions! Find My Size Staff Take: "The warmest suit I've ever owned. Super flexible and doesn't feel like a thick wetsuit. The entry is slightly harder to get out of, but is quickly made up for by how water tight it is." - Tom