Randy,
Corbin seats are warrantied against defects for one year.
Regarding the "doesn't fit you" issue, this is from their website:
Saddle Reworking is partially covered as mentioned in the Rework section. As the original owner, we will rework the shape of your saddle if needed at no-charge as long as we can refit the original cover back onto the seat. In cases where the modifications are so drastic as to demand a new cover, a recover charge would apply. The first shape rework is covered under warranty, additional reworking may result in charges. Over the past 30+ years, we have found the Corbin saddle works perfectly for roughly 90% of the riding population. If you believe that you will fall into the 10% catagory, make sure you discuss this with a Corbin sales representative when ordering your new saddle. Don't forget that your Corbin saddle has a break in period where the foam shape will conform to your body. You may want to put some mileage on it before contacting us for reworking.