I'm 6' 4" 225 lbs with a 38" waist and fairly athletic build. I am not sure who the designer is but these  things were tailor made  for me. I get compliments daily on how well they look. The fabric is sturdy but giving. The zippered chest pockets keep things from falling when I bend over which I do alot since I work in the maintenance field. They clean up surprisingly well after washing and dry quickly when hung out on a clothes line under my garage. If you are working in direct sunlight like I occasionally do here in the Caribbean they can get hot, but it does no bother me. If it did I certainly would not have ordered  3 more pairs.