<http://schema.org/weight>
"468 grams (16.5 oz)"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.newbalance.com/pd/leather-928/886350803467.html?cgid=102000&prefn1=width&prefn2=size&start=3&prefv1=D&prefv2=7.5>