Long-Loop cotton terry (390gsm). This fabric is double-faced - in has terry loops on both sides. Imagine your favorite beach towel after 100 washes!
 
Machine wash cold, and hang dry or tumble dry low.
 
While we preshrink all of our fabric, cotton knit still has a tendency to shrink a small degree (~1-4%) on the first wash. To minimize shrinkage, avoid high heat dryers.