Review (5/5): Great but should probably come with instructions
This comes with a simple black headband, but it's a little unclear how to attach the ears to it. You actually want to loop the headband through the fabric under the barrette clip, NOT clip the barrettes directly onto the headband. If you do this right, the ears fit tightly onto the headband and sit great. Otherwise they tend to flop all over and the headband is basically useless.
This is probably obvious to a lot of people, but given how many reviews there are about the ears being unstable, I'd bet a fair amount had this issue. Once you got it figured out, these are great.