I have stayed there that can highly recommend it. These are a set of international guide lines that ensure higher quality products are produced. Fine fibres can often be as low as 10microns, and also the finer it is the silkier it feels, but anything higher than 25microns can sound coarse. https://Www.Youtube.com/playlist?list=PLQSnJhLvLzmugEQ_ebjijzKB5lbacPep4