Neoprene is a synthetic rubber with many uses, including:

Waterproof: Wetsuits, scuba gear, and other water-resistant applications

Insulating: Jackets, boots, gloves, and hats

Shock absorption: Car bumpers and dashboards

Medical: Padding for orthopedic braces, prosthetic devices, and personal protective equipment (PPE)

Automotive: Fan belts, hose covers, shock absorber seals, and breaking and steering system components

Construction: Sealant between metal and concrete

Electronics: Insulator in power transformers, light bulbs, and other electrical applications

Other: Cable jackets, tubing, Orings, seals, tire-sidewalls, gasoline hoses, and yoga mats