Premium Select Travertine Pavers are denser and contain far fewer holes than Standard Grade Travertine Pavers.

The Premium Select grade has a dense structure with minimal holes and tiny pores. 

The Standard grade contains many holes throughout, which can be filled with silicon based epoxy and/or sand. If the holes are filled, this product is an excellent choice for value buyers and contractors. 

Standard grade is not suggested in freeze/thaw climates however as the material will most likely not hold up over time.

For more info, please see our blog post on this topic:

http://www.travertinemart.com/travertine-pavers/premium-select-vs-standard-grade-travertine-pavers