Here is part of the letter, please see the link for the rest at Indian Country Today Media Network.
"Urban Outfitters Inc. has taken Indigenous life ways and artistic expressions and trivialized and sexualized them for the sake of corporate profit. Your company also perpetuates the worst stereotype of Indians. This is theft of our very cultural identity, no less so than the theft of our traditional homelands that began with Columbus’ “discovery” of the Americas. On this day that America still celebrates as Columbus Day, I ask that do what is morally right and apologize to Indigenous peoples of North America and withdraw this offensive line from retail stores."