SX stands for SELFIE STAR LUXURIA which is a new line of SELFIE STAR and they are made of 100% human hair and premium synthetic fiber blended. MODU 100% HUMAN HAIR BLENDED SELFIE STAR LUXURIA EDGE LACE PART WIG SXEP-VAL SXEP-VALRegular price: $59.99Sale!: $49.99Color: 11B243T4/613GFT1B/30/33FT1B/118/99JFT4/27S/30M88/144 MODU 100% HUMAN HAIR BLENDED SELFIE STAR LUXURIA EDGE LACE PART WIG SXEP-WYNN SXEP-WYNNRegular price: $59.99Sale!: $49.99Color: 124DT1B/118/99 Modu Selfie Star Luxuria 100% Human Hair Blended Fiber 5X3 Swiss Lace Front Wig SX53-DEON (NEW!!!) newitem441933401Regular price: $79.99Sale!: $69.99Color: 4