http://www.amazon.com/gp/product/B002AQRSUW/ref=cm_cr_rev_prod_title

These Haggar slacks are the most comfortable slacks I have.  Yes, a previous pair of slacks began to fray at the bottom of each leg, but I had worn them for years, very frequently, and worked outside with them.  They are my favorite slacks.  They are slow to wrinkle and don't need ironing after being washed.

Update: Although the slacks are generally tough and durable, the exception is the bottom of each leg, which begins to show signs of fraying after only a few months.  This is a disappointment for me.