I tested a popular Korean SPF after it was recommended by Billie Eilish's aesthetician—spoiler alert: I'm in love with it.

      Consult any dermatologist or aesthetician, and they will agree that sunscreen is the most essential component of a skincare regimen. Without it, all other steps—no matter how pricey, like serums, toners, and moisturizers—are ineffective. This is because the sun's UV rays can speed up aging, lead to new skin issues, and most importantly, heighten the risk of serious health concerns. Aware of this, I am very meticulous about applying sunscreen daily, but not just any sunscreen. I have worked as a beauty editor for nearly a decade, and after testing nearly every sunscreen formulation available, I have established a stringent set of criteria for my daily SPF. Firstly, it must feel delightful when applied, meaning it should have a lightweight texture, be smooth, and not pill under any circumstance. Secondly, it needs to offer sufficient, broad-spectrum sun protection, with an SPF of 30 or higher preferred. Lastly, it should enhance my skin's appearance. I refuse to accept anything less than excellent, especially if it leaves a white residue. I want my sunscreen to leave my skin looking hydrated, plump, and dewy. Recently, I discovered a new Korean sunscreen that met all my criteria and more. The best part? It's been endorsed by experts, including Billie Eilish's aesthetician. Keep reading to find out which sunscreen has captivated me.

      Round Lab

      Birch Juice Moisturizing UV Lock Sunscreen SPF 45

      SPF: 45 | Type: Chemical | Size: 1.69 oz | Ingredients: Birch sap, allantoin, purslane Benefits: Broad-spectrum sun protection, blue light protection, antioxidant properties, hydration, and a skin-soothing formula.

      Here’s the sunscreen in question—Round Lab Birch Juice Moisturizing UV Lock Sunscreen SPF 45. This chemical formula offers broad-spectrum SPF 45 along with blue-light protection, combining avobenzone, homosalate, and octisalate. What truly differentiates it from other formulas I've tried are its key ingredients. Firstly, birch sap acts as a powerful antioxidant and anti-inflammatory. Secondly, allantoin is included for its skin-soothing properties. Lastly, it features Portulaca oleracea extract, known for being rich in antioxidants and commonly referred to as purslane. With added skin-hydrating humectants, this sunscreen is exceptional.

      The milky formula is so lightweight that I hardly feel like I'm wearing sunscreen at all, and I can easily apply makeup over it without any issues (there’s no pilling, creasing, or smudging). It effortlessly absorbs into the skin, eliminating the need for harsh rubbing or blending. The best part? It leaves no white or grey cast, just smooth, plump, and protected skin. Can you understand why I'm so enthusiastic about it now?

      Explore More Editor-Approved K-Beauty Products:

      Beauty of Joseon

      Relief Sun: Rice+Probiotics SPF50+

      Beauty of Joseon's highly popular Daily Relief Sunscreen is another favorite in the K-beauty realm.

      COSRX

      Advanced Snail 96 Mucin Power Essence

      This snail mucin essence truly lives up to its reputation.

      LANEIGE

      Laneige Lip Glowy Balm Matcha Bubble Tea

      I adore Laneige's shiny lip balms and am excited to try this Matcha Bubble Tea variant.

      BIODANCE

      Bio-Collagen Real Deep Mask Pack of Four

      If you want to wake up with glass-like skin, use this mask while you sleep.

      Dr. Jart+

      Every Sun Day Ultra Sheer Priming Sunscreen Stick SPF 30

      Sunscreen sticks like this one from Dr. Jart+ make reapplication a breeze.

      Innisfree

      Green Tea Seed Hyaluronic Cream 50ml

      This cooling gel moisturizer is the ultimate skin soother.

      MEDIHEAL

      Collagen Ampoule Pad

      I truly enjoy Korean toner pads, and these collagen ones are my current favorites.

      PEACH & LILY

      Glass Skin Refining Serum

      Trust me on this — you need to try Peach & Lily's Glass Skin Serum.