Walmart was apologizing on Monday after an appalling description of a product by a third-party vendor made its way onto the retail giant s website.The retailer was slammed early Monday after the color of a netting weave cap   used as a protective layer between a person s hair and sewn-in hair extensions   on its site was described as the color  N  Brown. Twitter user Kwani Luni tweeted a message about the wig color on WalMart s website, asking them  @Walmart what are you doing? Hey @Walmart what are you doing? pic.twitter.com/ermxukU5BX  Kwani Lunis (@KwaniALunis) July 17, 2017@Walmart replied to Kwani Lunis: pic.twitter.com/OL19g3Hmcq  Kwani Lunis (@KwaniALunis) July 17, 2017 Shortly after the controversy erupted, Walmart removed the racial slur and replaced the  Add To Cart  button with a message stating that the item was no longer available.A Walmart spokeswoman later apologized for the listing in a statement to The Post. We are very sorry and appalled that this third party seller listed their item with this description on our online marketplace,  spokeswoman Danit Marquardt wrote in a statement.  It is a clear violation of our policy, and has been removed, and we are investigating the seller to determine how this could have happened.   NYP