Round Lab Birch Juice UV Lock Sun Cushion SPF 50+
- Sun Protection Factor: SPF 50
- Water Resistance Level: Not Water Resistant
- Skin Type: All
- Target Use Body Part: Face
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A portable, fragrance free SPF50+ cushion built for reapplication over makeup, with birch juice water for a cooling feel.
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ASIN: B0F6CRVKSZCategory: Sunscreens
Overview
Round Lab's Birch Juice Sun Cushion is a Korean SPF50+ sunscreen in a compact cushion format, sized around 0.52 to 0.53 fluid ounces and built for reapplying over makeup.
The cushion form factor sets it apart from standard sunscreen lotions, letting it be pressed on top of makeup during the day without disturbing a finished look, while the birch juice water base is described as cooling and soothing. Manufactured by COSMAX and ranked 261 in facial sunscreens, it lists ecamsule and hyaluronic acid among its active ingredients.
- SPF50+ sun cushion
- 0.52 to 0.53 fl oz size
- Ecamsule and hyaluronic acid
- Fragrance free, paraben free
Who it's for
Suits people who want to reapply sun protection over makeup during the day without carrying a separate sunscreen stick or spray. Not the right pick for anyone who prefers a traditional lotion sunscreen applied by hand.
Pros and cons
- SPF50+ broad spectrum protection
- Cushion format reapplies easily over makeup
- Fragrance free and paraben free
- Birch juice water for a cooling feel
- Not water resistant
- Small 15 gram or 0.53 fl oz fill
Performance notes
Ecamsule is a UV filter used to extend broad spectrum coverage, paired here with hyaluronic acid for hydration as the cushion is pressed onto skin. The listing notes it is not water resistant, so reapplication after swimming or heavy sweating would need a fresh layer regardless of the cushion format.
Specifications
| Brand | Round LAB |
|---|---|
| Dimensions & fit | |
| Package Size Name | 15g |
| Item Weight | 0.03 pounds |
| Item Dimensions | 3 × 3 × 2.5 inches |
| Capacity & performance | |
| Item Volume | 0.5 fl oz |
| Age Range Description | Baby |
| Construction & materials | |
| Material Features | Fragrance Free |
| Material Type Free | Paraben Free |
| Other details | |
| Sun Protection Factor | SPF 50 |
| Water Resistance Level | Not Water Resistant |
| Skin Type | All |
| Target Use Body Part | Face |
| Item Form | Lotion |
| Skin Tone | All |
| Scent Name | Unscented |
| Product Benefits | Soothing |
| Number Of Items | 1 |
| Asin | B0F6CRVKSZ |
| Customer Reviews | {'ratings_count': '201', 'stars': '4.1'} |
| Best Sellers Rank | #26,775 In Beauty & Personal Care (See Top 100 In Beauty & Personal Care) #261 In Facial Sunscreens #3,214 In Facial Skin Care Products |
| Manufacturer | COSMAX |
| Additional Features | Sun Cushion form factor, Birch Juice Water, Cooling Effect |
| Recommended Uses For Product | Daily Protection, Moisturizing, Sun Protection, Travel |
| Manufacturer Part Number | RU02G0021 |
| Active Ingredients | Ecamsule, Hyaluronic_acid |
Frequently asked questions
What SPF does the Round Lab Sun Cushion provide?
SPF50+ broad spectrum.
Can this sunscreen be applied over makeup?
Yes, it is designed as a cushion for reapplying over makeup.
Is the Round Lab Sun Cushion water resistant?
No, it is listed as not water resistant.