<http://schema.org/weight>
"331.69 grams (11.7 oz)"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.newbalance.com/pd/mid-cut-950/MU950-M.html?dwvar_MU950-M_color=Black&cgid=109000&prefn1=sizeRefinement&prefn2=PIMSubCategoryData&start=15&prefv1=men_shoes_15&prefv2=Baseball>