I bought 4 waxed detal floss from a farmacy in Phu My Hung, Ho chinminh City. I imediaterly realized it is a fake product as it is much tougher and got stuck in my teeths. I use Oral-b floss for more than 20 years and 100% sure it is a fake. The printing in the cover is faded and not the same as other ones that I purchased from GNC. Please do some thing abot it to protect your branf and consumers.