The Un Cover Up Concealer - 77 in N77 color by RMS Beauty is reviewed by Miah, who demonstrates its effectiveness in concealing blemishes and reducing redness. Miah mentions having hyperpigmentation and acne scarring, particularly from hormonal acne during pregnancy. The concealer successfully covers a new breakout, leaving the skin looking natural. Miah highly recommends purchasing this product, emphasizing its ability to effectively conceal imperfections. Overall, the Un Cover Up Concealer receives a positive assessment for its ability to provide coverage and reduce redness, making it a worthwhile purchase for those with similar skin concerns.