The beloved Birch Juice sunscreen, made for the U.S. market.
ROUND LAB Birch Juice Moisturizing UV LOCK SPF 45 brings the lightweight, moisturizing feel the Birch Juice sunscreen line is known for into a U.S. OTC-registered Broad Spectrum SPF 45 formula.
Designed exclusively for the U.S. market, this daily facial sunscreen provides broad spectrum UVA & UVB protection while maintaining a comfortable, hydrating texture that feels more like skincare than traditional sunscreen.
The lightweight essence texture blends easily into the skin with no white cast and no heavy, greasy finish, making it especially easy to wear every day and layer underneath makeup.
It was also named NBC Select’s #1 facial sunscreen after its editors tested more than 100 sunscreens, earning praise for its lightweight hydration, comfortable finish, and everyday wearability.
Why We Love It
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Broad Spectrum SPF 45 UVA & UVB protection
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U.S. OTC-registered sunscreen developed specifically for the U.S. market
- Lightweight, moisturizing essence-like texture
- No white cast
- Comfortable, non-greasy finish
- Layers easily underneath makeup
- Designed with sensitive and acne-prone skin in mind
- Low-irritation tested
- German Dermatest certified
- Easy to incorporate into an everyday skincare routine
What Makes UV LOCK Different?
If you already know ROUND LAB’s original Korean Birch Juice Moisturizing Sunscreen, you may notice that this one looks a little different.
Birch Juice Moisturizing UV LOCK SPF 45 is the U.S.-exclusive OTC sunscreen formulation.
It was developed to maintain the moisturizing, comfortable skincare experience associated with the original Birch Juice sunscreen while meeting U.S. sunscreen requirements.
That means you’ll see Broad Spectrum SPF 45 on this version rather than the SPF/PA labeling commonly found on Korean-market sunscreens.
Who Is It For?
A great everyday sunscreen for anyone looking for:
- Lightweight daily SPF without a heavy sunscreen feel
- Hydration without an overly greasy finish
- A sunscreen that disappears into the skin without white cast
- An SPF that layers comfortably underneath makeup
- A gentle daily option for sensitive or acne-prone skin
How to Use
Apply as the final step of your morning skincare routine after moisturizer.
Apply evenly to the face, neck, and other exposed areas before sun exposure. Reapply according to the directions on the product label, especially during prolonged sun exposure.
Umma Bear Tip 🐻
If you loved the idea of Korean sunscreens because they feel more like skincare, this is a great example of what we’re excited to see more of: a sunscreen created for the U.S. market without giving up that lightweight, comfortable K-beauty experience.
Daily SPF is much easier to stick with when you actually enjoy putting it on.
Good to Know
U.S.-exclusive formulation: This is ROUND LAB Birch Juice Moisturizing UV LOCK SPF 45, an OTC sunscreen developed for the U.S. market. It is different from the Korean-market version of ROUND LAB Birch Juice Moisturizing Sunscreen.
