This is the first and only California King size sheet set I have ever purchased in which the fitted bottom sheet actually fit our deep mattress.  Other, similarly priced supposedly high quality products required the strength of several younger stronger persons to get it on the mattress. And even then they didn't fit properly.  

But this one goes on easily, fits properly and stays put. I'm pleased that for once I don't feel like I'm going to dislocate a shoulder when making the bed.