The mascara shield applicator guards mentioned in the search results are made of various materials such as silicone, resin, and food-grade silicone. These materials are soft, elastic, and easy to clean. Users have reported positive experiences with these tools, praising their quality, ease of use, and efficiency. The mascara shield applicator guards are designed to protect against mascara smudges, clumps, and mess-ups. They can be used to comb lashes and brows, and are washable with mild soap and water for most mascara formulas. Some users have also found them useful for combing through eyebrows. The tools are lightweight and have a smooth surface for easy cleaning. Overall, the feedback from users indicates that these mascara shield applicator guards are effective and convenient for applying mascara and protecting against smudges and clumps.