This is a little sample sheet of Bamboo sketch paper by Pentalic. It is designed as a lightweight sketchbook paper but took watercolor better than most any heavier weight papers I have tried actually. I did an initial sketch in a Sepia colored drawing pencil, followed by a bit of ink lines in the more foreground elements, painted it all up in watercolor and then added some lines with a Sharpie pen (dark gray). The handling of the paper blew me away for being so thin, and it didn't have any fibers lifting or coming off either, which I really expected since I did some very heavy washes for the sky and mid ground. It did warp, as most light weight papers do, but is acceptable given how much water I put on it. I would love to find a 100% bamboo paper sometime to try.
I could have gone a lot further on this paper and may yet still do that. I wish they offered a heavier weight version of this paper, this one at 100 GSM paper (all of 65 pounds). . . was a very thin paper, yet incredibly durable.