Synthetic Rubber Material Used to Make Wetsuits

Puzzle 10 of Deep Sea Journey Hard Pack

Question is: Synthetic Rubber Material Used to Make Wetsuits

and the answer is: NEOPRENE

Word Meaning:

NEOPRENE — A synthetic rubber, a polymer of chloroprene, commonly used in wetsuits, laptop sleeves, orthopedic braces, electrical insulation, liquid and sheet-applied elastomeric membranes and flashings, car fan belts, etc.

Definitions from Wiktionary.