Maelys B-Tight Lift & Firm Booty Mask. Brand new, never used. Still in original packaging and have not been opened. 2 available for purchase. Description: Firm Butt. Strong Strut. Get a firmer-looking booty with this bestselling leave-on booty mask that is clinically proven to reduce the appearance of cellulite and visibly firm the look of skin around the booty and thighs. 100 mL. / 3.38 Fl Oz.