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Atom Top in Hibisco

Atom Top in Hibisco

Regular price €31,99
Regular price Sale price €31,99
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Size guide

 This bikini is made in Spain with high-quality materials which are resistant to chlorine, salt, and creams or oils. It's ideal for sunbathing and getting a tan. A classic triangle top in red, perfect for girls with small boobs. Its multiple ties allow you to adjust it in many different ways to find your perfect fit.

The studio model wears size M/L for the bottom and XS/S for the top. She is 1.62m tall, wears a bra size 85A, and pants size 38.


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Shipping & Returns

Our orders are delivered within 2-5 business days and cost €3.99 for orders within the Peninsula. We offer free shipping on orders over €50. 

Free shipping to the Balearic Islands and Peninsular Portugal on orders over €65.

For more information, check out our Shipping Policy.

You have 14 calendar days to return your order or exchange sizes if you're not satisfied. Size exchanges are completely free on your first purchase (Mainland Spain). Find more information in our Refund Policy. Refund Policy.


⚠️ At Bum, we do not follow a standard sizing system as our tops are designed for women with smaller chests. Therefore, if in doubt, we recommend sizing up.

The atom bikini is designed to cover the essentials and thanks to its ties it adapts to different body types.

You can also use our size guide to estimate what size will fit you best, keeping in mind that bikinis run small.

If you have any questions, feel free to send us a direct message or an email.


The Atom bikinis, handmade in Spain, are inspired by the atom, the smallest and most basic particle of matter. They are designed to cover as little skin as possible, minimize tan lines and enhance the female body.

The top is multi-position and is made up of two triangles, and the thong, also with ties on the sides, can be worn low or high-raise. The back part is made to make you feel comfortable: it doesn't slip and slide, it doesn't get baggy, and it makes your ass look perfectly round.


Our fabrics are certified by the OEKO-TEX® 100 standard as a guarantee of quality, and have UPF 50+ sun protection, which means they block more than 98% of UVA and UVB rays, to take care of your skin during the day.

In addition, we only use high-quality Italian fabrics made with ECONYL®. Econyl is a nylon recovered from plastic waste (including fishing nets, carpeted floors and industrial plastics salvaged from around the world). In this way we are transforming waste into beautiful bikinis that allow us to give an actual second chance to the resources that the planet has to offer.


Ⓧ Pill-resistant

☼ UV protection

♺ Recycled fibers

⚠ Ultra chlorine resistant

⍉ Resistant to oils and creams

✦ High coverage


Our bikinis are made with high-quality materials and are designed to withstand the test of time, but it's up to you to follow these tips to make them last even longer.

  • Rinse after each use: Salt and chlorine deteriorate swimsuit fabric, which is why it's important to remove their remains by rinsing the bikini or leaving it to soak for a while every time you use it.
  • Handwash: If you want to wash it more thoroughly, use neutral soap and lukewarm water. Rub it gently so it doesn't stretch, and rinse with plenty of water.
  • When drying: Always put it to dry in the shade, as the sun wears out and fades the fabric.

Visual size reference:

What our customers say


I love the quality and design of these bikinis, they're ideal. In my case, I bought the black Atom thong model and it's great: comfort, aesthetics, and finish. I recommend this 100% Spanish brand and its life philosophy (self-confidence and boldness). Long live thong bikinis and flaunting them all! - Aurora


  • ⭐️ Made with ECONYL®

    A high quality nylon recovered from plastic waste.

  • 🏠 Local production

    Handcrafted in Spain: our entire process is made at home.

  • ⏳ Timeless design

    Basics that never go out of style and that you won't get tired of.

  • 🍑 Round ass

    A design that adapts to the female body, its shape enhances the glutes creating a peach effect.