<http://schema.org/weight>
"298 Grams (10.5 oz)"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.newbalance.com/pd/new-balance-990v3/W990.html?cgid=201000&prefn1=size&start=4&prefv1=8%7C7%7C5&dwvar_W990_color=Grey_with_White>