<http://schema.org/mpn>
"GYPSUM II MID WP M, coffee bean/bronze mist"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.outdoorweb.cz/Obuv/Turisticke-boty-37114/panske-37145/GYPSUM-II-MID-WP-M-coffee-bronze-panska-trekkova-obuv>