NEOPRENE /EPDM BLEND A soft, flexible, and highly durable sponge rubber, neoprene foam offers excellent thermal and moisture insulation, and is resistant to Ozone, sunlight, and oxidation, as well as many chemicals and petroleum derivatives. Neoprene/EPDM has a unique molecular structure that renders it resistant to breakdown by water and air. As such, it is commonly used in athletic equipment like gloves, wetsuits, and knee pads.