31. He opened with a group of short, precisely shaped jersey Neoprene impersonators. 32. This product was the first synthetic rubber and is known today as Neoprene . 33. Neck dams may have neoprene or latex seals, depending on diver preference. 34. Other materials used to alleviate this are PVC, nitrile, and neoprene . 35. The foils were made of maraging steel coated in neoprene to prevent corrosion. 36. When caving in wet caves neoprene wetsuits provide superior insulation to fleece underclothes. 37. Some gloves include neoprene lining to keep hands cool. 38. The project at first used neoprene meteorological balloons. 39. Remove the neoprene valve seats and springs by prying them loose with a screwdriver. 40. He shimmies out of the steaming black neoprene , revealing a wealth of freckles.