<http://schema.org/weight>
"281 grams (9.9 oz)"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.newbalance.com/pd/new-balance-665/MW665.html?cgid=102000&prefn1=width&dwvar_MW665_color=Silver_with_Blue&start=16&prefv1=D>