<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?pmax=75&cgid=102000&prefn1=size&pmin=50&dwvar_MW659_color=Brown&start=9&prefv1=9>