1. Do these shoes run true to size...
1. Do these shoes run true to size ? i usually wear 9.5
2. are they lightweight hiking shoes ?
All the Merrel's I've had ran true to the size for a medium width foot. Some shoes felt slightly better in a half size up but only if the fit was for a heavy weight sock. They are right in the ballpark of maker's lightweight hiking shoe options with (to me) the important Vibran and Gore brands as I have been disappointed in the past with shoe's with other waterproofing or soles. Good luck!