| http://www.w3.org/ns/prov#value | - The resilient material can be a material selected form the from the group consisting of elastomeric materials such as silicone, polyurethane, Neoprene(poly-2 chloro 1, 3 butadiene, more commonly known as polychloroprene), natural rubber, Hypolon (chlorosulfonated polyethylene rubber), butyl (including chlorobutyl and bromobutyl), Thiokal (copolymer of ethylene-propylene-cyclopentadiene), and butad
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