I flew to South Korea with room in my suitcase and came home wishing I’d packed a second one, because after visiting Olive Young about a dozen times in a single day, I couldn’t help stashing several of these masks in my luggage.

The product I kept going back for was the Dr.Jart+ Cryo Rubber Firming Mask, a two-step treatment that pairs a serum ampoule with a cooling rubber mask. It’s the Korean beauty product that caught my attention while I was shopping in Seoul; the mask feels more like a treatment than a basic sheet mask, and the cooling sensation makes the whole experience feel instantly refreshing.

The formula contains adenosine and peptides, ingredients commonly used in skincare products designed to improve the appearance of firmness and smoothness. The two-step format is also a big part of the appeal. You apply the ampoule first, then place the rubber mask over it, creating a snug layer that helps keep the serum against your skin while you wear it.

I’ve tried plenty of face masks, but I understood the appeal of this one the moment I used it after a long day of walking around Seoul. My skin looked fresh, plump and more polished afterward, and the cooling mask was especially welcome after spending hours outside and moving from store to store.

That’s why I was immediately interested when I spotted the Firming Mask for just $12 ahead of Prime Day (which is returning on Oct. 6 to 7 this year). At that price, it’s an easy beauty buy, especially for a treatment you can keep on hand for nights when your skin needs an extra boost.

Now that I can get it without booking a flight to Seoul, I’m tempted to stock up all over again.

This article was written by Victoria McDonnell, New York Post Commerce Journalist & Content Strategist, who has spent countless hours researching, testing hundreds of products and comparing the latest makeup, skincare, hair and beauty items and trends to determine what’s truly worth your hard-earned cash. She evaluates formulas, textures, ingredients and more, in addition to consulting medical and industry experts. Some of Victoria’s latest conquests include testing the best sheet masks on the market, and a rinse-and-repeat review of the best shampoos for all hair types and budgets. Victoria, who received a beauty industry essentials certification from the Fashion Institute of Technology, has been creating shopping guides for the New York Post since 2021 and previously held positions at Insider Reviews and CNN Underscored.