Celestial Algae

(1,476 customer reviews)

Anti-chafing swim shorts with CompressionFit™ – The premium mesh-free lining that adapts to your body shape and eliminates 100% of irritation.

☀️ SUMMER SALES 2025: 50% OFF + BUY 2, GET 1 FREE

£69.99 GBP £34.99 GBP
50% OFF

📦 Free delivery within 7 business days

Soft mesh-free lining

Quick-drying technology

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Lightweight for comfortable movement

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Secure zippered pockets

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📦 Easy returns and exchanges if the size isn’t right.

Sizes 2XL, 3XL, and 4XL are made to order — please allow an additional 2 days for delivery.

Size guide

⭐️ 100-day satisfaction guarantee

Technical information

  • Avalys swim shorts are handmade.
  • They are crafted from a premium, stretchy fabric that fits snugly to the body.
  • Featuring an elastic waistband with an adjustable drawstring, two zippered side pockets, and one back pocket.
  • Each pair includes a built-in secret inner pocket.

Composition / Care Instructions

Our swim shorts are crafted with the utmost care.

The outer layer is made of 90% high-quality polyamide and 10% elastane.

The inner lining consists of 88% nylon and 12% elastane.

Wash cold on a gentle cycle with a soft spin, then hang to dry.

Avoid using the tumble dryer.

Free shipping

We offer tracked home delivery on all orders with no minimum purchase required.

Orders are processed within 1 business day before shipment.

Once shipped, the estimated delivery time is 7 to 10 business days.

As soon as your order is dispatched, you will receive a confirmation email with a tracking link.

100-day satisfaction guarantee

You can try our swim shorts for 100 days completely risk-free. If you’re not satisfied, we’ll refund your purchase.

Our summer offer lets you get a third pair of swim shorts free when you buy two.

Please note: as indicated in your cart, you must manually add the third pair to your cart for the discount to apply automatically.

If you don’t add it and complete your order, we won’t be able to send the free third pair once the order has been dispatched.

So please double-check and make sure you’ve added your free third pair of swim shorts to your cart before completing your purchase.

4 reasons why your holidays will be exceptional

No irritation

Thanks to our new ultra-soft, mesh-free CompressionFit lining, enjoy a second-skin feel and say goodbye to uncomfortable chafing.

Ultra-fast drying

With our new-generation breathable fabric, stay dry faster than ever — whether after a swim or during your summer outings.

Built-in secret pocket

Discreet and spacious, this hidden pocket is perfect for securely storing your cards, keys, or phone — even on the move.

Side pockets with zippers

For maximum security, our zippered pockets keep your personal belongings safe wherever you go.

4 reasons why your holidays will be exceptional

Beach walks

Sports activities

Poolside strolls

Explorations and adventures

Our greatest pride: the satisfaction of our customers

Write a review

John B.

Style and confidence

I received many compliments at the beach! I really felt great about myself—thank you for this quality!

James S.

Like a second skin

The fabric is amazing, it feels like a second skin. I no longer worry about chafing after a day at the beach.

Alexandre I.

The perfect combination

I was looking for swim shorts that are stylish and practical — I found a gem. Fast delivery and excellent p...

David W.

A real difference

These swim shorts transformed my holiday. Comfort, style, and a sense of freedom that's hard to find.

Liam Y.

The perfect piece for traveling

I wore them every day during my holiday, and they stayed flawless and super comfortable. I wholeheartedly r...

Joshua S.

My favourite shorts

It’s a pleasure to wear them. Since I got them, I’ve been recommending them to all my friends. They’ve gain...

Laurent L.

Elegance and confidence

I’m very particular about my clothes, but these swim shorts won me over immediately. I feel elegant and con...

Peter N.

Above-average quality

I was impressed with the finish and comfort. It’s rare to find a product so well designed for summer.

Steve N.

Total freedom

Finally, swim shorts that don’t scratch or stick and keep up with me through all activities. I love them!

Tiago L.

fort from the first wear

As soon as I tried them on, I knew they were going to be my favourite shorts this summer. Soft, lightweight...

Duarte E.

A splash of happiness

These swim shorts make me want to be in the sun every day!

Satisfied or refunded: 100-day guarantee

We’re confident you’ll love Avalys swim shorts. We offer a 100-day trial so you can try them completely worry-free.

Frequently Asked Questions

Where are your swim shorts made?

Our swim shorts are designed in France and made in certified workshops across Europe, with a focus on quality and durability.

How do I choose the right size?

Please refer to our size guide available on each product page. If you’re between two sizes, we recommend choosing the larger size for greater comfort.

Can I machine wash my swim shorts?

To extend the life of your swim shorts, rinse them with fresh water after each use, wash by hand or machine with cold water, and let them air dry. Avoid using bleach or a tumble dryer.

Is the lining comfortable?

Absolutely. Our shorts feature an ultra-soft, mesh-free lining that feels like a second skin and prevents irritation—ideal for all-day comfort.

Does it dry quickly?

Yes, thanks to its ultra-fast drying fabric, your swim shorts will be ready to wear again in no time.