There are so many mats out there . . . come to think of it, I have quite a few mats in storage in various places around the globe :)
But my mat of choice has got to be the Manduka travel mat. It’s light enough to take anywhere in the city, or even much further afield. It served me proper in India, folding just right into my cross-country back pack. And it’s serving me well here in the urban sprawl (the fewer grams of weight I lug around this mad space, the better!).
So cheers, Manduka travel mat! you make my life a lighter place!