Old Navy: $3 Women’s Knot-Back Tanks (Ends Today) April 11, 2015 By: Tricie share Today 4/11 is the last day to snag a Women’s Knot-Back Tank at Old Navy for only $3. The Price is valid in-store and online. *Limit 5 per customer Click here to shop now! Please be advised that this post may contain affiliate links. See my Disclosure Policy for details.