PRE-ORDER - Anti-UV swim shirt with half zip - Ultimate - Coolibar

Sun protection: UPF 50+ guaranteed, highest rate

We offer Europe-wide shipping and free shipping options, more details below.

Coolibar is an American brand that runs large, use the size guide for more details.

Size guide


COOLIBAR Tops for Men

Coolibar is an American brand that runs large. If you are between two sizes, we strongly advise you to take the smaller size.

Brand Size (US) Chest Size (cm)
S 86 - 92
M 97 - 102
L 107 - 112
XL 117-122
XXL 127 - 132

To measure your chest size, place the tape measure at your armpits, at the strongest point, and go around.

We offer Europe-wide shipping and free shipping options, more details below.

You have a question? Check out our FAQs.

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SIZE ADVICE: Coolibar is an American brand that runs large, so we advise you to take a size smaller than your usual size in France. Use the size guide for more details.

If you have any questions, we will be happy to answer you by phone at +33 9 77 08 01 51

Anti-UV swimming T-shirt with half zip - Ultimate - Coolibar

Enjoy water sports or simply swim longer with this men's UV protection t-shirt that will protect your entire upper body. Its lightweight Aqua Plus fabric™ has a water-repellent finish and is resistant to chlorine, salt water and perspiration. This easy to put on and take off long sleeve swim shirt also has an elasticated back hem to keep it in place. The sleeves have thumbholes to give you extra sun protection without rubbing and stays in place without fail.

  • UPF 50+: Blocks over 98% of UV rays
  • Zip neckline
  • Raglan sleeves with thumbholes
  • Bottom back hem with elastic to keep the UV protection shirt in place
  • Flat seams to prevent chafing
  • Aqua Plus fabric™: Water repellent with 4-way stretch and quick drying performance. Chlorine and salt water resistant.
What does UPF 50+ mean?

This product is UPF 50+ certified.

UPF stands for "Ultraviolet Protection Factor". It is an index measuring the ability of a fabric or material to filter ultraviolet rays. The UPF 50+ index is the highest anti-UV certification in Europe, according to European standard EN 13758-1. A UPF 50+-certified UV garment blocks over 98% of UV rays, protecting your skin against possible burns and lesions.

By way of comparison, a cotton summer t-shirt often has a protection factor of UPF 5 or above. This means that 20% of UV rays pass through the fabric, which is a lot for someone who has to stay out of the sun or is exposed to it for long periods.

At KER SUN, your safety is our priority. That's why we use our own laboratory to test the anti-UV clothing and accessories we offer on our online store, to make sure they comply with UPF 50+ certification.

Payment methods

After validating your basket and entering your delivery details, simply select how you would like to pay for your purchases:

  • Credit card or Debit card (Visa, Mastercard, Apple Pay)
  • PayPal
  • Alma: pay in 3 installments, free of charge, from £50 onwards
  • Wire transfer

Each country has it own specific requirements in terms of delivery methods and times. 

You can find all our delivery options and times by country be cliking here

Please be aware that delivery times are given in working days from Monday to Friday. All products are shipped from France.


Would you like to make a return? Find out more about the procedure here.

Returns for refund :  

  • Returns for refund are possible for 14 days from the date of receipt of the parcel. We will issue a full refund for the returned product(s)*.
  • We offer a return transport label for returns from mainland France, Belgium, Germany, Luxembourg, the Netherlands, Spain and Italy.
  • For returns from Sweden and Denmark, we offer the shipping label for 5€.
  • For other countries, the return is at the customer's expense.

*If shipping costs have been paid at the time of ordering, they will not be refunded.

Exchanges : 

  • To make an exchange, simply return the item and order the new one. Once the product has been returned to our premises, you will be refunded.

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About Ker Sun

Ker Sun is above all a personal story. About ten years ago, Claudia, our co-founder, was diagnosed with Lupus, an autoimmune disease that forces her to be extremely careful with her sun protection. That day, she felt like she was losing some of her freedom. Like many, she no longer felt safe going outside.

In 2019, to make wearable sun protection accessible, we launched Ker Sun. Ker Sun's mission is to protect every person from sun damage. We want to give back to those with the most sensitive skin, the freedom to enjoy outdoor activities safely. We also actively participate in the prevention of UV-related diseases.

Today Ker Sun is the first French online store specialized in sun protective clothing and accessories. We distribute different brands and quality products to guarantee you an optimal sun protection.

At Ker Sun, your safety is our priority! All selected sun protective clothing is UPF50+ certified regardless of the color of the fabric. Take clothes that you will enjoy wearing, we take care of your skin.