Weight, don't know about that. I'm a little over 6 foot and 155, and my Wife who also wore a prototype is 5'9 and a half and 122. We both liked the shoe, now my prototype didn't have all the extra plastic on the upper that this one does. It is stiff, but as a slow day trainer I liked it. Normally I wear lighter shoes, Skylon, Zoom Vapor Plus, etc.