<http://schema.org/weight>
"321 grams (11.35 oz)"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.newbalance.com/pd/new-balance-510v2/MT510-V2.html?cgid=68000&prefn1=_ShoeLast&start=21&prefv1=Standard&dwvar_MT510-V2_color=Black_with_Yellow>