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Any of several tough, porous leather substitutes.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Chemistry) (of a plastic) permeable to water vapour
(Chemistry) a substance having this characteristic, esp one based on polyurethane and used in place of leather in making shoe uppers
[C20: from poro(sity) + (poly)mer + -ic]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014