I bought one 2008 Mazda 3 yesterday and purchased one all weather mats as well.
http://ep.yimg.com/ca/I/yhst-2480917..._2138_88446047

However, my friend said the mat set I purchased is not a Mazda genuine part since the mats come without Mazda logo on the back.
He said all genuine part should have this logo on the back.(Please check the picture below)
Anyone can check this for me?

Thank you so much!

 

they may be correct, I just looked at my mats which I got new with the car from the dealer. And they don't have the same logo as what you have. The front mats had a different shape & style than the front, but they aren't the same as what you have pictured.

Now, if they fit, and it's a rubber mat - it doesn't matter that they are origina mazda parts or not. It's also possible they may have different versions of the mat since its not a critical vehicle part, so they may be labeled differently depending what company actually made them.