... of our hair, hereby we declare that in China, the way we use to measure length of hair(straight, ... length is measure by hand, it is unavoidable that there will be small tolerances(0.1-0.3 ... no tangle.100% unprocessed hair, no chemical, can use for a long time.Double layers machine made weft, tight ... hair production according to your requirements.And we can promise that all our hair are 100% human hair, ...