<http://schema.org/weight>
"378 grams (13.3 oz)"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.newbalance.com/pd/new-balance-659/MW659.html?cgid=40075&prefn1=sizeRefinement&dwvar_MW659_color=Brown&start=17&prefv1=men_shoes_14>