<http://schema.org/weight>
"468 grams (16.5 oz)"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.newbalance.com/pd/leather-928/602850712159.html?cgid=102000&prefn1=sizeRefinement&srule=By%20Popularity%20%287days%29&start=6&prefv1=men_shoes_8.5>