Mary shares her favorite under-eye concealer in her video review. The Under Cover Concealer in Tip toe over the line color by Pretty Vulgar1 is her go-to choice. She loves its creamy texture and the fact that it's small enough to fit in her purse for on-the-go touch-ups. Previously, she used a regular concealer with an under-eye brightening tint, but she finds that this under-eye concealer works much better. Mary offers to demonstrate the difference between the two in a future video if her viewers are interested. Overall, the Under Cover Concealer by Pretty Vulgar1 seems to be a reliable and convenient option for achieving flawless under-eye coverage.