The band on this mitten keeper is really thick and durable - kind of like suspenders.  This can be a good thing, but it looked like it would be uncomfortable if it got tangled inside the coat.  Also, it is really, really long.  Maybe it states somewhere in the details about the item how long it is, but I didn't look for that.  My daughter is 18 months old, and the bands of the mitten keeper hung out of her coat sleeves about three to four inches.  We didn't use these this year, because they just didn't look like they would work for her at this point, but maybe next year, after she has grown and we get a bigger coat, we will try them again.  They seem to be very well made, and the clips are really strong.