Kiehl's Butter Mask For Lips - Overnight Lip Treatment, 0.35oz/10g. Size: 0.35oz/10g New, Never Used. AUTHENTIC Guarantee! Kiehl's Buttermask For Lips, Hydrating Overnight Lip Mask, Nourishes & Restores Dry Lips, Intense Hydration, with Coconut Oil & Wild Mango Butter, Paraben-free, Fragrance-free. Infused with Fairly Traded Coconut Oil and Wild Mango Butter, this overnight treatment for dry lips smoothes and softens while you sleep. Blanket your lips in nourishing moisture with our hydrating lip