Crafted with naturally long fibers, bamboo is super-durable and is unlikely to pill or tear. And, as it doesn't absorb moisture (unlike cotton), it won't take on natural oils from your skin, meaning it's less likely to discolor and more likely to last longer.
Make sure you understand the distinction between a duvet and a duvet cover. It might not be easy to distinguish between the two primary components of a duvet set while shopping without prior knowledge. Keep in mind that the duvet is the fluffy blanket contained within the set, and the duvet cover is the warm shell surrounding the duvet. For a complete duvet set, you'll need both.
Satin
This is the piece of fabric that creates a sheath or barrier between you and your pillow. Typically, a pillowcase has one opening on the short side of the fabric and extra fabric that will drape over a few inches, when placed over the pillow insert. The drape is sometimes generous and provides a decorative element to what is otherwise a largely functional piece.