I wear nothing but 514 Slim Levis jeans.  I have owned all different styles and colors since they
released the 514 line.  I've owned a pair of these before but they wore out -zipper broke,
denim degraded as expected after a few years and developed holes at stress points.
These are a good style but not really as rigid as you would expect from the product description.
Denim material seems thinner on the pair I got and tumbled (not rigid), unlike the denim thickness
of the previous pair I owned or other truly rigid Levis.  They fit really good; true to spec but will
wear out faster than truly rigid Levis.