Unisex Men's & Women's UV Hat UPF 50+ - Boating Coolibar

Sun protection: UPF 50+ guaranteed, highest rate

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

Coolibar - Hats/Caps

Size Head circumference
57 cm / 22,44 inch
58,5 cm / 23,03 inch
L/XL 61 cm / 24 inch

Practical tip : to take the measurement, you should stand at the strongest point of your head. This is in the middle of the forehead, usually 1 cm above the eyebrows, where the hat will rest. Take the measurement with your head upright and the tape horizontal.

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

You have a question? Check out our FAQs or contact us by email or live-chat.


For any questions it will be our pleasure to answer you by phone at+33 9 77 08 01 51

Unisex convertible sun protective hat - Boating - Coolibar

Finally, a convertible boat hat with a brim that's carefully crafted so as not to compromise your eyesight. When it comes to reliable sun protection, trust this unisex convertible boat hat for your next adventure of the day.

Lightweight, transportable and easily adjustable thanks to an elastic cord for a perfect fit. This hat is even floaty and features reflective stripes for unpredictable episodes! The chin bar and full neck drape are ready to keep sun protective in place when you need it and easily take it off when you don't.

  • UPF 50+.
  • Unisex
  • Travel friendly, collapsible and packageable
  • Internal cooling sweatband
  • Mesh panel covered on the rear crown for ventilation
  • The neck drape folds back under the hem.
  • Elastic cord and clasp at the back for easy adjustment.
  • Removable reflective chin strap with clasp
  • Anti-reflective lining under the brim to prevent water reflections
  • Polyester
  • Hand wash, line dry

Recommended for long days on the water when you need to stay dry and get UPF 50+ sun protection while boating, fishing or boating.


Approximate circumference: head circumference less than 57cm (S / M), less than 59cm (M / L), less than 61cm (L / XL)
Drape Length: 25cm
Front and rear border 8.5cm
Side border 7cm

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 out ultraviolet rays. The UPF 50+ index is the highest UV protection certification in Europe, according to European standard EN 13758-1. An UV protective garment with UPF 50+ certification blocks over 98% of UV rays, protecting your skin from possible burns and lesions.

By way of comparison, a cotton summer t-shirt often has a protection factor of around UPF 5. 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 of time.

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

Payment methods

  • Credit cards (Visa, Mastercard, Apple Pay)
  • Paypal
  • Alma: payment in 3 instalments
  • Bank Wire
  • Cheque


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 by clicking 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.

Customer Reviews

Based on 4 reviews
Philippe L.

il est très agréable à porter, à ranger, et une chose que j'ai découvert, je peux facilement le boutonner sous le menton, ce qui protège mes oreilles très efficacement ... en plus d'être chic, léger et beau :-)

Victoria F.

Chapeau convertible anti-UV unisexe femme et homme - Boating - Coolibar

Pedro N.
Buen sombrero

Me va muy bien, su ala ancha protege muy bien y ofrece buena protección, su faldón trasero protege el cuello perfectamente, permite llevarlo colgado, y todo se puede guardar en el bolsillo. Muy bien

Marie R.
. Pas encore testé.

Attendons d'être dans le contexte du grand soleil...

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.