The quality of these hair extensions are great. I have worn extensions for about 5+ years I have tried all other popular clip in brands and this one is by far one of the best for quality of the actual hair and colour selection. The quad weft is amazing as well so thick could do with another one now though as mine have thinned out. As this is the only downside for me is that I have found these have shed a lot. However this is probably because I have changed the method of installing as I have them permanently fixed in my hair by a micro bonded method which is not what they are intended for. Overall though I think the thickness of how they were when I first received them was wonderful for the price would recommend! Hayley