Round Lab Birch Moisturizing Mild-Up Sunscreen: Birch-Forward Daily SPF for Sensitive Skin

Round Lab's Birch Moisturizing Mild-Up Sunscreen pairs SPF 50+ PA++++ protection with birch juice as the hero supporting ingredient. Birch juice (the sap collected from birch trees, a traditional Korean ingredient) contains amino acids, minerals, and natural xylitol, and is marketed for its skin-conditioning effects. Combined with the sensitive-skin SPF formulation, this is positioned as a daily sunscreen for combination to dry skin that doesn't tolerate typical SPF well.

At 50ml for $27.01, this is competitive pricing for Korean daily SPF. The "Mild-Up" naming signals Round Lab's focus on gentle formulation. Round Lab has built a reputation on sensitive-skin-first K-beauty, and their SPF range fits the pattern: minimal fragrance, chemical filter system that doesn't overwhelm reactive skin, moisturizing supporting cast.

What It Does

Korean-approved UV filter system blocks UVA/UVB to SPF 50+ PA++++. Birch juice provides mineral and amino acid-rich skin conditioning during wear. Hyaluronic acid and panthenol support hydration and barrier. The result: a SPF that also conditions and hydrates, particularly useful for dry-sensitive skin that often gets stripped by generic sunscreens.

Who It's For

• Dry or sensitive skin: Moisturizing formulation.
• Daily sensitive-skin SPF: Reactive skin friendly.
• Round Lab routine users: Coordinates with other Round Lab products.
• Birch juice fans: Traditional Korean skincare ingredient.
• Non-mattifying SPF preference: Semi-dewy finish.

Key Specs

• Volume: 50ml
• Price: $27.01
• SPF: 50+ PA++++
• Hero supporting: birch juice, hyaluronic acid, panthenol
• Finish: semi-dewy, no white cast

How to Use

Final step of AM routine. Apply a two-finger length across face, including neck. Wait 2 minutes before makeup. Reapply every 2 to 3 hours of sun exposure.

FAQ

How does this compare to Beauty of Joseon Relief Sun?

Both are sensitive-skin-friendly Korean daily SPFs. Beauty of Joseon leads on rice extract and tan bark. Round Lab leads on birch juice. Similar category, different ingredient focus. Both work well for dry-sensitive skin.

Is it reef-safe?

Korean-approved filter combinations typically avoid oxybenzone and octinoxate. Generally considered reef-friendlier than conventional US sunscreens.

Does it leave a white cast?

Minimal. Chemical/hybrid filters avoid heavy white cast on most skin tones. Deep skin tones should patch test.

How long does 50ml last?

2 to 3 months with daily face application.

Can it replace my moisturizer?

For combination or dry skin: may work as a standalone. For oily skin: you may need a separate lightweight moisturizer first.

Related Products

Pair with Round Lab Pine Calming Cica Cream or browse Korean sensitive-skin sunscreens.