The Andrey Coiffure collection uses Luxury Oriental human hair sourced from Mongolian and Chinese regions. The hair undergoes a procedure to align the natural directions of the cuticle and prevent the hair from damage. This is the secret to preserving hair extensions premium condition and vibrant, long-lasting colour. Andrey Coiffure special keratin formula resembles human hair structure and behaviour: expanding when wet, and contracting upon drying. This is the key to long-lasting pre-bonded extensions and our special formula keeps all hair extension strands within the bond, with little to prevent shredding. Our hair is Double Drawn, which means that it has to be divided and hand-matched according to the different lengths, which means the hair has the same thickness from root to tip. Andrey Coiffure hair extensions come in 100 pieces per bundle. That is approximatel 100g. Our recommende bundles are as follow: 100-125g - Fine to Medium Hair 125-150g - Medium to Thick Hair 175g+ - Thick