FREE Garnier Wonder Mask at Dollar Tree!! Dollar Tree Sale Dates: NOW through 06/13/2020 Check out your Shampoo Section of Dollar Tree for the Garnier Wonder Masks. If your store has them, we have two available coupons to make these FREE!! Scroll down to see how to do this deal! Here's How To Do This Deal: Buy: One (1) Garnier Wonder Mask $1.00 Use: $3/2 Garnier Fructis Shampoo, View Post