Kratom is Mitragyna Speciosa,  a tropical evergreen tree in the coffee family native to Southeast Asia. It is indigenous to Thailand, Indonesia, Malaysia, Myanmar, and Papua New Guinea, where it has been used in traditional medicines since at least the nineteenth century. 
Mr. Puff's offer five choices of strains.
This is:
Trainwreck- this is a blend of White Maeng Da and Red Bali, used for an enhanced energy, pain relief, mood stimulation and relaxing.