R&R Sun Serum Mineral SPF 50

Undefined Inc R&R Sun Serum Mineral SPF 50

$28.00

Shipping calculated at checkout.

Shade: Medium Tint

Medium Tint Medium Tint
Light Tint Light Tint
Untinted Untinted

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Undefined Inc R&R Sun Serum Mineral SPF 50

$28.00

Shipping calculated at checkout.

Mineral SPF 50, PA four plus
Non-nano zinc, 12 percent
Niacinamide and allantoin
No white cast, skin finish

What it is

A mineral sunscreen serum from Undefined Inc, a plant-powered skincare brand. Silicone-free, non-comedogenic, and water-resistant, in untinted, light, or medium tint.

What it does

Broad-spectrum UVA and UVB protection from 12 percent non-nano zinc oxide, plus niacinamide and allantoin to refine pores and calm skin. Absorbs quickly to a natural skin finish. The tints add extra protection against blue light, one of the main drivers of stubborn dark spots.

Who it's for

Anyone who wants daily mineral SPF without the chalky finish. Three shade options mean deeper skin tones actually get a match.

How to use

How much: The two-finger rule: two full lines along your index and middle fingers.

1. Apply to dry skin as the last step of your routine.
2. Massage in well until fully absorbed.
3. Apply 15 minutes before sun exposure and reapply at least every 2 hours.

Where it fits: Last step in the morning routine, after moisturizer. Works as a standalone on clean skin too.

Inside the formula

Zinc Oxide 12%

The mineral SPF that sits on top of lips to block UV.

Niacinamide

Vitamin B3 that evens out skin tone

Allantoin

A soothing ingredient that calms skin and holds in moisture.

Jojoba

A plant oil that nourishes without feeling heavy.

Tremella Mushroom

A mushroom extract that hydrates like hyaluronic acid.

Full ingredient list

Untinted: Water (Aqua), C12-15 Alkyl Benzoate, Jojoba Esters, Caprylic/Capric Triglyceride, Propanediol, Polyglyceryl-4 Diisostearate/Polyhydroxystearate/Sebacate, Tridecyl Salicylate, Niacinamide, Nylon-12, Methylpropanediol, Silica, Coco-Caprylate, Polyglyceryl-2 Dipolyhydroxystearate, Sodium Chloride, Caprylyl Glycol, Bisabolol, Allantoin, Oryza Sativa (Rice) Bran Extract, Stearalkonium Hectorite, Lecithin, Polyglyceryl-3 Diisostearate, Polyglyceryl-3 Polyricinoleate, Phenylpropanol, Helianthus Annuus (Sunflower) Extract, Tocopherol, Rosmarinus Officinalis (Rosemary) Leaf Extract, Tetrasodium Glutamate Diacetate, Sodium Hydroxide. Tinted (adds iron oxides for the shade): Allantoin, Bisabolol, C12-15 Alkyl Benzoate, Caprylic/Capric Triglyceride, Caprylyl Glycol, Coco-Caprylate, Helianthus Annuus (Sunflower) Extract, Hydrogenated Lecithin, Iron Oxides, Jojoba Esters, Lecithin, Methylpropanediol, Niacinamide, Nylon-12, Oryza Sativa (Rice) Bran Extract, Phenylpropanol, Polyglyceryl-2 Dipolyhydroxystearate, Polyglyceryl-3 Diisostearate, Polyglyceryl-3 Polyricinoleate, Polyglyceryl-4 Diisostearate/Polyhydroxystearate/Sebacate, Propanediol, Rosmarinus Officinalis (Rosemary) Leaf Extract, Silica, Sodium Chloride, Sodium Hydroxide, Stearalkonium Hectorite, Tetrasodium Glutamate Diacetate, Tocopherol, Tremella Fuciformis Sporocarp Extract, Tridecyl Salicylate, Water.

Why we stock it

We stock this because mineral SPF 50 that actually absorbs is hard to find. This one finishes like skin, not sunscreen, and the water resistance makes it a real daily driver.

The Nexus standard

Vetted before it lists

Every brand on our shelf is screened before it can sell here. Fewer than you'd think make it through.

Direct from the maker

We work directly with independent brands and skip the retail markup, so you pay less for the same products.

30-day returns

Changed your mind? Returns are easy within 30 days on unopened products. Secure checkout, always.

About the brand

Undefined Inc

Clean beauty for every body

Founded in 2018 by Dorian Morris, Undefined exists to democratize beauty and undefine its standards. It's a clean, conscious, inclusive plant-based skincare and wellness brand with multitasking clean-ical formulas, from the Glow Collection to the R&R Collection built on adaptogens. Now sold at Target, Whole Foods, and Ulta, it keeps prestige-level formulas at prices most people can actually afford.

We stock Undefined because they make plant-based skincare that performs at prices most people can actually afford, and the inclusivity is real, not marketing.

Skincare questions, answered

Where does this go in my routine?

Thinnest to thickest: cleanser, toner, serum, moisturizer, then SPF in the morning. This product's How to use section above tells you its exact step.

When will I see results?

Give it 4 to 6 weeks of consistent use — that's one full skin cycle. Hydration shows up in days; tone and texture take weeks. If your skin reacts badly (stinging, new breakouts that don't settle within a week), stop using it.

I have sensitive skin. Will this irritate me?

Patch test first: a dab behind your ear or along your jawline, wait 24 hours. Fragrance-free formulas are the safest bet for reactive skin — check the highlights on this page.