Incomplete set, tight band, single layer [SEP] 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.