You can get a free sample of e.l.f. Blue-ty Sleep Night Oil through social media ads on platforms like Instagram and Facebook. To increase your chances, follow the brand's accounts, interact with their posts, and keep an eye on your feed for the offer. 

This nourishing night oil is packed with skin-loving ingredients like blue tansy and rich antioxidants to soothe and rejuvenate your complexion overnight. Lightweight yet deeply hydrating, it helps repair and restore your skin’s natural glow, so you wake up refreshed and radiant. Perfect for all skin types, this nighttime essential absorbs quickly and works while you rest.