e "Style GT 77" appears to be a reference to a specific type of synthetic hair weft. However, without more context about the product or brand, it is difficult to provide an accurate description.
However, here is a general description for a product of this type:
"Style GT 77 is a high quality synthetic weft, designed to provide a strong and durable base for hair extensions. Made with strong synthetic materials, this weft is ideal for making wigs, hair extensions and other hair accessories Its sturdy construction ensures long life and reliable hold, while its soft and supple texture allows for comfortable wear. With the Style GT 77, you can create beautiful and stylish hairstyles. trust."