My 2-year old son looked soooo adorable in this costume.  Too bad I only got a photo of him in it while he was sleeping. When awake, he REFUSED to wear the headpiece. (Perhaps he has too much dignity!)
It's the typical felt-like material.  It's not going to hold up too long (assuming you want it for dress up), but it was great for the 3 parties we attended over a week's time.  I got it here for $20, but it's not worth more than $15.  Still, it's soooo cute.  So I guess the extra $5 was worth it--even if only for one good photo of a sleeping Ewok.