<http://schema.org/weight>
"305 grams (11 oz)"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.newbalance.com/pd/new-balance-577/885166580180.html?cgid=202000&prefn1=sizeRefinement2&prefn2=color&start=6&prefv1=women_shoes_7.5&prefv2=Black%7CRed>