Every summer we ask ourselves the same questions: Where to go on vacation? How much SPF do I need? And how, for God's sake, do I prevent those infamous white lines that form under straps, hems, and anything else that dares to cover my skin? Tan-through swimsuits promise a solution – they let UV rays through and promise a tan even where regular swimsuits block them. Ideal, right?
Tan-through swimsuits?! But before you enthusiastically throw them in your shopping cart – Tan-through swimsuits – and start dreaming of a flawless tan, let's check – is this a brilliant innovation or just another bikini that promises too much and covers too little?
What are tan-through swimsuits and why are they “in” again?
Tan-through swimsuits are made from special fabrics that allow UV-A rays to pass through to the skin. In theory, this should mean an even tan all over the body, without white lines, streaks, and that infamous “perfectly white bottom” that no one misses in vacation photos.
It sounds like a dream ordered by Instagram itself. But as always, the devil is in the details – in this case, the fabric, its thickness, your skin, and most importantly, how long you're actually willing to lie in the sun like a human parasol.
🔍 Top 3 Tan-through Swimsuit Brands: Between Hype and Reality
1. True Tone Swimwear – tanning with Japanese science
This American brand uses Japanese technology that filters out UV-B rays (the ones that burn) and lets in UV-A (the ones that tan). These swimsuits are light, stretchy, and breathable like a summer breeze. They even claim to boost libido and creativity—which is hard to measure, but if they make you feel sexier and more creative, who are we to argue?
The truth? Users report that the lines still remain – mainly due to the thicker edges that create a shadow from the sun. And that they are sometimes… a little too transparent. So, if you are a more reserved type, test them at home first, not on the city beach. But it is true that these swimsuits are the “hottest” of all. View the 2025 collection.
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2. Kiniki – British pioneer of UV tanning
With over 40 years of experience and patented Transol™ fabric, Kiniki promises up to 80 % UV-A transmission and maximum exposure. The swimsuit is comfortable, stylish and even said to help with vitamin D production.
But: users say the results are not the same everywhere – especially on the buttocks and chest, where the skin is less pigmented. And yes, again – transparency can be an issue. If you’re not aiming for the “invisible bikini challenge”, check how much fabric is actually visible. View the 2025 collection.
3. Cooltan – easy tanning with an American smile
Cooltan swears by Microsol V fabric, which is said to be a hybrid between swimwear and SPF protection. Users praise its quick drying, comfort, and solid, even tan.
However: If you don't wear your swimsuit long enough (and calmly, without waves and cocktails), the effect is limited. So, if you're a more active type on vacation, the result can be a little "creative". Check out the 2025 collection!
Effectiveness? Mixed like a mojito in Ibiza – Tan-through swimsuit
Realistically? Tan-through swimsuits are not a miracle. Reviews on TikTok, Reddit, and various review platforms confirm: at best, they reduce lines by about 30-50 %, and at worst, they force you to think about whether you really wanted to be in public in a swimsuit that is a little too transparent.
Additionally, dermatologists warn that because swimsuits don't offer classic UV protection, they can lead to a higher risk of sunburn and skin damage. That's why SPF is your best friend—even under a tan-through bikini.
Our recommendation? With a combination to the golden mean
If the idea of an even tan sounds tempting to you, but you're not willing to sacrifice your privacy or health, we recommend a smart combination:
- Use tan-through swimwear where it makes sense., but don't forget the sunscreen.
- Check user reviews and pictures – real experiences speak louder than advertising campaigns.
- Test in a private environment to start – if you don't feel confident in them, they're not for you. (And there's absolutely nothing wrong with that.)
Conclusion: a fashionable innovation with a few loopholes
Tan-through swimsuits aren't a solution for everyone - but for many, they're an interesting step towards worry-free sunbathing. If you know what to expect, combine them with protection, and don't blindly trust marketing promises, they can be a great vacation accessory.
But if you're looking for the absolute perfect tan without any effort... well, then you'll probably have to get off your beach towel at some point.
