San Ysidro Slide Sand
$120
Slip into sunshine.
Golden, glowy, and impossibly easy — the San Ysidro Slide in Sand feels like a perfect beach day on your feet.
This is that Fleks feeling.
Soft but supportive. Secure but never stiff. Just right.
Wear them with cutoffs. Throw them on with your favorite dress. Book the trip. Take the long way home. These are the slides you reach for without thinking — and somehow they make everything better.
Plush comfort, perfected.
Soft shearling across the top. Sculpted support beneath your feet. The San Ysidro Slide is the sandal that captures that unmistakable Fleks feeling.
Every Fleks style is built using proprietary Blumaka recycled foam, delivering the perfect balance of plush cushioning and supportive comfort — all while giving new life to materials that would otherwise go to waste.
The result is a slide that feels incredibly soft yet surprisingly supportive. Easy to slip on, endlessly wearable, and designed to move with you through the day.
This is comfort that doesn’t shout.
It simply works.
THE FLEKS COMFORT SYSTEM
Just-right comfort.
Most casual footwear gets one thing right — softness.
But softness alone doesn’t support your foot.
At Fleks, we designed a system that delivers the balance your feet actually need: plush cushioning, natural support, and stable comfort that lasts all day.
Powered by Blumaka Recycled Foam
Every Fleks style is built using proprietary Blumaka recycled foam, giving new life to reclaimed performance foam from the athletic footwear industry. Instead of becoming waste, these materials are transformed into durable cushioning that feels great and holds up over time.
The Comfort Trifecta
At the core is our Signature Sculpted Midsole, designed around the three things your foot actually needs:
• Deep heel cup — helps keep your foot secure
• Sculpted arch support — encourages natural alignment
• Subtle toe bar — helps prevent forward slide
The result is footwear that feels soft when you step in, supportive when you move, and comfortable enough to wear all day.
Better materials. Less waste.
Our foam construction allows us to use up to 85% recycled material by volume, transforming performance foam scrap into long-lasting comfort. It’s a smarter way to make shoes — and a better way to feel good in them.
Fit note: This style runs long. If you’re between sizes, we recommend sizing down.
Product Details
- Our proprietary FLEKSfoam is very proudly made of up to 85% recycled performance foam waste.
- Contoured FLEKSfoam footbed is engineered to cradle the foot and enhance support for all-day comfort.
- Thoughtfully designed soft arch support delivers gentle support and reinforcement for your feet.
- Heel cup secures the heel firmly in place, ensuring stability and security.
- Integrated toe lock prevents forward sliding of the toes.
- Plush FLEKSfoam upper that flexes and adapts with every step provides cushioning for the top of your foot too.
- FLEKSwave EVA outsole is made with 15% recycled content, giving the outsole ultimate wearability.
- 100% recycled non-woven fabric spacer allows the outsole to lay flat.
- Our proprietary FLEKSfoam is very proudly made of up to 85% recycled performance foam waste.
- Contoured FLEKSfoam footbed is engineered to cradle the foot and enhance support for all-day comfort.
- Thoughtfully designed soft arch support delivers gentle support and reinforcement for your feet.
- Heel cup secures the heel firmly in place, ensuring stability and security.
- Integrated toe lock prevents forward sliding of the toes.
- FLEKSwave EVA outsole is made with 15% recycled content, giving the outsole ultimate wearability.
- 100% recycled non-woven fabric spacer allows the outsole to lay flat.
- Fleks styles fit a little long… it is meant to since we graded the sizing on the 1/2 size.
- If you are between sizes we recommend you size down.
- If your foot runs on the narrow side; we recommend you size down.
- If your foot runs on the wider side or you have a higher instep; we recommend you size up. (This particular style may not be ideal for you, but don’t fret, we have one coming soon that will be)!
- Unsure of your size? Check out our Size Guide
We offer both ground shipping and priority shipping on all orders. USPS Priority shipping is available to most addresses in the U.S. The shipping options available for your address will be displayed at checkout.
If you happen to live in the Central Coast area you can pick up at our warehouse in Goleta, CA., select 'local pickup' at checkout.
To learn more about our shipping and return options see our FAQ page.
We're proud to offer a 90 Day Total Happiness Guarantee. That means, if you aren't completely, 100%, over-the-moon thrilled with your new Fleks, for any reason at all, we will gladly exchange or return your product. Simply click this link to start an Exchange or Return and we will send you a return label to ship the shoes back. If you are exchanging (we hope you are!) please let us know what you would like to exchange your current Fleks for.
To learn more about our return policy see our FAQ page.
- Our shoes are made from recycled ETPU scraps, salvaged from manufacturing waste.
- Our innovative process involves repurposing manufacturing waste, (think of an overflowing waffle iron), grinding it up, and transforming it into our proprietary FLEKSfoam.
- We save this top quality foam from going into landfills and incinerators, contributing to a greener future.
- Our shoes utilize up to 85% waste by volume.
FLEKSfoam powered by Blumaka
Better materials, a better process, a better product.
Through our relentless pursuit of innovation and ethical practices, we have developed a patented process that takes
performance footwear manufacturing waste (recycled ETPU scraps, headed to the incinerator or the landfill) grinds it up and repurposes it all into a super comfortable, remarkably durable, proprietary FLEKSfoam. This process uses no solvents and A LOT less water than traditional manufacturing and it all happens at our very own company owned ethical factory. Seriously incredible.
