<http://schema.org/mpn>
"Koven Mid WP K, midnight navy/tawny olive"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.outdoorweb.cz/turistika/turisticka-obuv/detske-37046/Koven-Mid-WP-K-juniorska-outdoor-obuv-9978329>