ROUND LAB Birch Juice Mild-up UV Lock Sunscreen SPF 50+
- SPF 50+ broad spectrum UVA and UVB
- Zinc oxide mineral filter, reef safe
- Water resistant, listed for beach and pool use
- 1.69 fluid ounces, 50 milliliters
- Birch sap and hyaluronic acid, controls oil
- Fragrance free, free of 19 harsh ingredients
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A fragrance-free mineral sunscreen cream for sensitive skin that is water resistant and controls oil. No water resistance duration is listed, so reapply after swimming.
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ASIN: B0DK4MXPMDCategory: Sunscreens
Overview
Round Lab makes this mineral sunscreen cream with zinc oxide as the UV filter and birch sap for hydration. The listing names daily wear, hiking, camping and beach use.
The mineral filter, reef safe claim and sensitive skin focus make it a broad everyday and outdoor option. The limit is that zinc oxide formulas can leave a pale residue, and the water resistance time is not stated.
Who it's for
Commuters, hikers and pool visitors with sensitive skin will find the listed uses cover them. Shoppers who dislike mineral filters on deeper skin tones should test it before relying on it.
Pros and cons
- Mineral zinc oxide filter
- Reef safe claim
- Oil and sebum control
- Water resistance duration not listed
- Mineral filters can leave residue
Performance notes
Zinc oxide reflects and scatters ultraviolet light on the skin surface, so it protects as soon as it is applied and needs an even layer. Water resistance fades with swimming and toweling, so reapplication matters at the pool or beach. Birch sap and hyaluronic acid add moisture to offset the dryness mineral filters can cause.
Specifications
| Brand | Round LAB |
|---|---|
| Dimensions & fit | |
| Item weight | 49.99 Grams |
| Item Dimensions | 5 x 1 x 1 inches |
| Package Size Name | 50ml |
| Capacity & performance | |
| Item Volume | 50 Milliliters |
| Age Range Description | Adult |
| Included components | |
| Unit Count | 1.69 Fluid Ounces |
| Other details | |
| Sun Protection Factor | 50+ SPF |
| Water Resistance Level | Water Resistant |
| Skin Type | All |
| Item Form | Cream |
| Scent Name | Unscented |
| Product Benefits | Broad spectrum UVA/UVB, reef safe, oil control, non-comedogenic |
| Additional Features | Birch sap, mineral-based UV filter, fragrance-free, clinically tested |
| Recommended Uses For Product | Daily wear, outdoor activities, beach and pool use, hiking and camping, sensitive skin |
| Active Ingredients | hyaluronic acid |
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Frequently asked questions
How do I care for Round Lab Birch Juice sunscreen after swimming?
It is listed as water resistant but no duration is given. Reapply after swimming or toweling off.
Is Round Lab Birch Juice Mild-up UV Lock reef safe?
The product benefits list reef safe and a mineral-based UV filter. The title names zinc oxide.
Is Round Lab Birch Juice sunscreen suitable for sensitive skin?
It is listed for sensitive skin, non-comedogenic and clinically tested for safety. A patch test is still sensible.