Reviews
Thinkbaby and Thinksport sunscreen review
20% non-nano zinc with the maximum water resistance, mineral-only across the range. The cast is the price.
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This is the brand we recommend most often on this site, and the reason is a specification that almost nobody else matches: 20% non-nano zinc oxide with the maximum 80 minutes of water resistance, mineral-only across the entire range, in a base that spreads better than that zinc load has any right to.
Thinkbaby and Thinksport are the same filter system in different packaging — baby and children's formulations under one name, sport and adult under the other. The cast is the honest cost, and at 20% zinc it is visible.
Quick picks
Tap any row to read the full write-up below.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 |  Thinkbaby Safe Sunscreen SPF 50+The one to buy first · SPF 50+ | Children, and households wanting one bottle | |
| 2 |  Thinksport Sunscreen SPF 50+Best for adults and long days · SPF 50+ | Hiking, sport and full days outdoors | |
| 3 |  Thinkbaby Safe Sunscreen Stick SPF 30Best stick · SPF 30 | Faces, ears and noses, and for a child to use themselves |
What the brand makes
- Thinkbaby Safe Sunscreen SPF 50+ — the flagship, 20% non-nano zinc, 80 minutes.
- Thinksport SPF 50+ — the same filter system marketed for adults and sport.
- Sticks SPF 30 — for faces, ears and small areas.
- Face formulations — lighter bases within the same mineral approach.
The range is mineral-only throughout, which is unusual and means you can buy it without checking the panel — a genuine convenience for a brand you hand to other people.
Our picks in detail
01 · The one to buy first
Thinkbaby Safe Sunscreen SPF 50+
Thinkbaby · Read our Thinkbaby review
20% non-nano zinc with the maximum 80 minutes of water resistance and nothing in it to sting eyes — the specification that makes this the default recommendation for families.
- Actives:
- 20% non-nano zinc oxide
- SPF:
- SPF 50+
- Water resistance:
- 80 minutes
- Reef status:
- Zinc only — no oxybenzone, octinoxate or octocrylene
- Best for:
- Children, and households wanting one bottle
What works
- Maximum water resistance with a high published zinc load
- Zinc-only, so it does not sting
- Suits adults as well as children
The trade-off
- Visible cast
- Too heavy for daily face use
02 · Best for adults and long days
Thinksport Sunscreen SPF 50+
Thinksport · Read our Thinksport review
The same filter system in adult packaging, in large tubes that make applying the correct amount realistic across a whole trip.
- Actives:
- 20% non-nano zinc oxide
- SPF:
- SPF 50+
- Water resistance:
- 80 minutes
- Reef status:
- Zinc only — no oxybenzone, octinoxate or octocrylene
- Best for:
- Hiking, sport and full days outdoors
What works
- Same 20% zinc and 80-minute water resistance
- Large sizes available
- Spreads well for the zinc load
The trade-off
- Visible cast
- Pricier per ounce than drugstore mineral
03 · Best stick
Thinkbaby Safe Sunscreen Stick SPF 30
Thinkbaby · Read our Thinkbaby review
A non-nano zinc stick with 80 minutes of water resistance that glides rather than drags — which is what makes a child willing to use it unprompted.
- Actives:
- Non-nano zinc oxide
- SPF:
- SPF 30
- Water resistance:
- 80 minutes
- Reef status:
- Zinc only
- Best for:
- Faces, ears and noses, and for a child to use themselves
What works
- 80-minute water resistance
- Glides more easily than most mineral sticks
- Child can apply it themselves
The trade-off
- SPF 30 rather than 50
- Not for full-body coverage
Why the specification matters
Two numbers do most of the work here.
20% non-nano zinc. That is a high load, and it is published rather than implied. Non-nano is an unregulated claim in general, but a brand that states its concentration is telling you something checkable. Non-nano versus nano.
80 minutes of water resistance. The maximum a US label may claim. Many minimal or clean-positioned mineral brands stop at 40 minutes, which is a real difference on a pool afternoon. Getting both a high zinc load and the maximum water resistance in one formula is the brand's actual achievement. Water-resistant sunscreen explained.
Texture
Better than 20% zinc usually is. It is not a light formula and nobody would mistake it for one, but it spreads without the drag and chalkiness of older high-zinc products, and that matters more than it sounds: a formula people can actually spread is a formula they apply enough of.
For faces, the body formula is workable but heavy. The face-specific and stick products are the better route, and a dedicated face SPF from another brand is better still for daily wear.
Honest limitations
- The cast is visible. At 20% non-nano zinc it could not be otherwise. On medium and deep skin tones this is a serious limitation, and there is no tinted option in the range.
- Too heavy for daily facial wear. It will pill under sunglasses and under makeup.
- Pricier than drugstore mineral options per ounce, which matters when you need an ounce per person per application.
- Availability is good but not universal — easier to find than a boutique brand, harder than Neutrogena or Coppertone.
- Scented versions exist. If you need fragrance-free, check the specific product rather than assuming.
How it compares
Against [Badger](/reviews/badger): Think has double the water resistance and a higher zinc load in a formula that spreads better. Badger has the shorter ingredient list. For a swimming day, Think.
Against [Blue Lizard](/reviews/blue-lizard): comparable water resistance and both mineral-only in their core ranges. Think spreads more easily; Blue Lizard has the broader variant range and the UV cap. Either is a defensible household choice.
Against [Vanicream](/reviews/vanicream): Vanicream is the better choice for reactive skin specifically, with no fragrance or botanical content anywhere. Think is the better general-purpose family product.
Who should buy it
Buy it if you want one mineral sunscreen that covers a household, if there is swimming involved, if you are traveling somewhere with reef restrictions, or if you want a brand you can hand to someone else without explaining which variant to take.
Buy something else if you need a daily facial SPF, or if you have deep skin and the cast is the thing that stops you wearing mineral sunscreen at all — in which case tinted formulas are the better starting point.
Sources
- Sunscreen: How to Help Protect Your Skin from the Sun — U.S. Food and Drug Administration
- Questions and Answers: FDA Requirements for Over-the-Counter Sunscreen Products — U.S. Food and Drug Administration
- Sunscreen FAQs — American Academy of Dermatology
- Sun Safety: Information for Parents About Sunburn and Sunscreen — American Academy of Pediatrics (HealthyChildren.org)
- Sunscreen chemicals and coral reefs — NOAA National Ocean Service
Frequently asked questions
Is Thinkbaby sunscreen good?
It pairs 20% non-nano zinc oxide with the maximum 80 minutes of water resistance across a mineral-only range, which is a specification few competitors match. The honest cost is a visible white cast and a texture too heavy for daily facial wear.
What is the difference between Thinkbaby and Thinksport?
The same mineral filter system in different packaging — Thinkbaby for babies and children, Thinksport for adults and sport. The formulations differ in base and scent rather than in filter type.
Is Thinkbaby reef safe?
The range is mineral-only, using non-nano zinc oxide as the sole active filter, which satisfies every current reef-protection law. Reef safe has no legal definition, so the actives panel is what matters.
Can adults use Thinkbaby sunscreen?
Yes. It is simply a zinc-based mineral sunscreen, and Thinksport is the same filter system in adult packaging. Many adults with reactive skin prefer the baby formulation.
Does Thinkbaby leave a white cast?
Yes. At 20% non-nano zinc it could not avoid one. There is no tinted option in the range, so if cast is your obstacle a tinted mineral from another brand is the better route.
Read next
Mineral Sunscreen
The best mineral sunscreens
Zinc-only picks for faces, bodies and kids, chosen on actives and water resistance rather than packaging.
Kids & Baby
The best sunscreen for kids
Zinc-first kids formulas chosen on water resistance, sting and how fast they go on.
Reef-Safe & Ingredients
The best reef-safe sunscreens
Mineral-only formulas that satisfy every current reef-protection law, chosen on the actives panel.
Reviews
Badger sunscreen review
Published zinc concentrations and very short ingredient lists, against a thick texture and 40-minute water resistance.
Reviews
Blue Lizard sunscreen review
One mineral system across baby, kids, sensitive and face — and the texture trade-off that comes with it.
Sun Safety
What water-resistant sunscreen actually means
What the 40 and 80-minute claims measure, why toweling ends them, and how to plan a pool day around it.