Adam Friedman, MD, a board-certified dermatologist based in Washington, DC, added that in addition to reducing puffiness, coolness can help relieve itchiness in the eye area, which "can worsen puffy eyes due to rubbing them." Often, reusable undereye masks are a tool to improve the effects of your skin-care products, so keep in mind that if you aren't noticing improvement, consider adjusting the other products in your routine. For our list of the best undereye masks, we considered each product's performance across five primary categories: product ingredients and efficacy, packaging, fragrance, texture, and product wear.