https://www.sishair.com/product-category/virgin-hair/ Virgin hair belongs to Remy hair but it has never been dyed, bleached, permed or straightened. The cuticles are kept intact and all the hairs run in the same direction. Since it has never been chemically processed, you can do whatever you want to change the color or style of the hair.
https://www.sishair.com/product-category/remy-hair/ Remy hair, which is also spelled as Remi Hair, is a kind of hair extension that comes from a single donor’s natural human hair. The cuticles are kept intact with all the tips in the same side and bottoms in the other. Remy hair can be made into both hair weaves and wigs.
https://www.sishair.com/product-category/wigs/ Hand tied human hair lace wigs are made with a French or Swiss lace material base. They are made as a full lace or partial lace front with a stretch weft back. Each hair strand is individually stitched into a lace material which creates the natural look of hair at the base.