Your purchases have donated $412,888 to marine science research and education!
Hey, we're Waterlust
We're in business to build a more sustainable world by bringing environmental science into your life in creative ways.
★★★★★
Waterlust is the best!
Great products, great customer service, great mission! Worth every penny.
- Michelle Rumbaut, TX



















Educational resources & donation included with every purchase. Learn more.
Like you, our shorts are amphibious, meaning they are equally at home underwater or on land. Whether you're running, biking, diving into a weekend project or the deep end of the pool, these versatile hip huggers will keep up.
Characteristic spots and stripes adorn the largest fish in the sea forming an intricate pattern, like a warrior painted for battle. Scientists use these distinctive markings to identify individual whale sharks. Like a fingerprint, each is as unique and special as the last. 5% of sales will be donated to The Marine Megafauna Foundation, a non-profit focused on the research and conservation of threatened marine megafauna, particularly sharks and rays.
Our signature fabric is sleek, soft, and luxurious, while strong, substantial, and resilient. It's got a gummy, supportive, and smoothing stretchiness you'll love, comfortably hugging you in all the right places.
88% Repreve® RPET (recycled polyester made from post-consumer plastic bottles), 12% spandex
Safe, premium performance yarns: Our high-quality, fully traceable yarns are sourced through sustainable partners in the U.S. These materials meet rigorous chemical safety standards and are independently verified for over 1,000 harmful substances like BPA and PFAS through OEKO-TEX® STANDARD 100 certification.
High-quality, responsible printing: Our products are printed using heat transfer sublimation, a printing technique that is widely considered to be the safest for both workers and the environment. It requires no water, eliminates dye from entering water systems, and minimizes ink and fabric waste. All the inks and dyes we use are also OEKO-TEX® STANDARD 100 certified.
Recycled materials, minimal waste: Our commitment to environmental responsibility starts with sustainable fibers and yarns. We use synthetic yarns made from recycled plastic bottles, which helps remove and repurpose existing plastic.
Learn more about our environmental impact and manufacturing here, and our materials here.
Flat $5 shipping on every U.S. order. Shipping is a real cost, we keep it low, flat, and honest. No inflated prices hiding “free” shipping, no pressure to over-buy to hit a threshold. Just a simple $5 that encourages more intentional ordering, which means less waste and fewer emissions. International orders just pay cost to ship, which is calculated at checkout.
Orders are lovingly packaged using minimal packaging and eco-responsible materials, and shipped from our wonderful partner warehouse in Pennsylvania within the same or next business day. We’ll email you with your tracking info as soon as your order is shipped.
Learn more about shipping, exchanges and returns here.
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Whale sharks (Rhincodon typus) are fish, not whales - allowing them to hold the esteemed title of "largest fish in the sea" (since sharks are fish too!). These charismatic creatures can reach lengths of 12 meters (40 feet) or more! Despite their large size, they feed on some of the smallest organisms in the sea, plankton. Hanging vertically in the water column they're able to suction feed and filter these tiny organisms through their gill rakers much like a giant vacuum cleaner pulls dust and dirt from a kitchen floor, filtering the fragments into its chamber within.
Unfortunately, approximately 100 million sharks are killed every year by humans, through direct targeted fishing efforts as well as unintended bycatch from other fisheries. The whale shark is one species of shark that is particularly vulnerable to this commercial fishing due to their high value in international trade, in addition to their highly migratory nature and normally low abundance. Research into the lives of these gentle giants can help us to manage their populations and keep these magnificent fish in the ocean where they belong.
“Waterlust's support provides critical seed funding for us to rapidly develop and implement whale shark conservation projects in areas where this globally-endangered species is most at risk. This includes Mozambique, where our research and awareness work helped the government decide to fully protect whale sharks just a few weeks ago. We love working with a company that is so committed to making a positive change in the world.”
Dr. Simon Pierce, Co-Founder / Principal Scientist
the Marine Megafauna Foundation
The Marine Megafauna Foundation is helping to shed light on the population structure, migratory patterns, and the conservation requirements of these threatened sharks. Created in 2009, they aim to research, protect and conserve the large populations of marine megafauna (large marine species) found along the Mozambican coastline. Almost all whale sharks encountered by divers are juveniles and most are males. Where the school-bus-sized mature sharks swim, what they eat, and where the females give birth has long been a mystery, however their team is now very close to making these discoveries. 5% of sales from your purchase will go to the Marine Megafauna Foundation for satellite tags that are needed to track the movements of these large female whale sharks.
I've worn these nearly everyday since they arrived. Absolutely love them! I did size down from what thesize guide suggested as I like a more compressed fit and they're perfect. Having 2 pockets is a huge bonus too and I can see myself living in these for the foreseeable haha!
Ok, so I’m the first to admit that I’m self conscious about my jiggly thighs. These are excellent quality, just a touch short for me…I opted for the board shorts instead.
I’ve bought this brand a few times over the last few years and they are so comfortable and durable. My absolute favorite. 10/10 recommend
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