This Review Title is Incomplete set, tight band, single layer and the content is: i only received 4, not the pack of 6 i ordered; i realized it after I'd already opened and wore a hat overnight. Amazon is trying to get a price adjustment for me.  The hats are single layer, with the rougher texture on the inside. i wore it inside out so that the silkier smoother side was against my hair.  My hair is very much frizz prone.  The band is wide, but tight.  i found myself tugging at it, trying to stretch it out.  This set wouldn't work for overnight oil/hydration. treatments because of the single layering (oils will leak through) and general discomfort caused by the tightness and (my) excessive fussing with the band..There are other information for this review, one is This reviewer did purchase it and the other is 0 people think this review is helpful.