Love both pairs! Can't wait
"Love both pairs! Can't wait for warm weather to wear them!"
Opal Cushion Soft Flip Flop
Opal Cushion Soft Flip Flop
Final SaleSale
Regular price
$29.99
Sale price
$29.99
Regular price
$43.00
Shipping calculated at checkout.
Womens, Mens & EU Sizes Explained
Selecting the perfect shoe size may sometimes seem to be confusing; this can be due to the many conversions between women's and men's sizes or understanding different measurement systems such as European shoe size. Many people search online prior to making a purchase because many different regions have different systems for defining their shoe sizes.
For the purpose of this guide, we will clarify the conversion from size 9 to all other size conversions, as it happens to be one of the most commonly searched for shoe sizes on the internet, so all of the conversion formulas above would also apply to other shoe sizes as well. Therefore, once you understand how each formula/conversion works, you can then apply them to any shoe size with confidence.
Opal earns its keep on long days, the kind where you're walking more than you expected and your usual sandals are already complaining. An enhanced-grip rubber outsole keeps your footing steady on nearly any surface, and a plush quick-drying lining keeps feet cool and dry no matter the weather. Tailored support and a subtle medium arch give it a personalized feel for extended wear, and at just 0.365 lbs a pair, you genuinely forget you have them on. The built-in arch support helps with alignment and eases pain linked to plantar fasciitis, flat feet, and heel discomfort, while the gentle nylon toe post and cushioned yoga mat footbed add soft, shock-absorbing comfort to every step. Opal is endorsed by the APMA, so this comfort has real credibility behind it, not just a nice-sounding claim. Stick with what you normally wear. Between sizes or wide feet? Round up, not down (a 7.5 becomes an 8). This is a medium width fit. The Size Chart has exact measurements if you want to be sure.
Benefits
Benefits
Features
Features
Size and Fit
Size and Fit
Choosing Your Size
Order your usual sandal size for the best fit.
Half Sizes or Wide Width
If you wear a half size or have wider feet, size up to the next full size. Ex: If you’re a 7.5, we recommend ordering an 8.
Fit Notes
- Medium width fit.
- See our Size Chart for measurements.
Shipping & Returns
Shipping & Returns
Free Shipping $60+
Ships within 24 hrs from Austin, TX
30 Day Comfort Promise
Enjoy 30 days of comfort—love them or exchange free.
Easy returns & exchanges
Try a pair risk-free for 30 days
Secure Checkout
Safe, encrypted payments every time
Made for Comfort, Backed by Support
Podiatrist Recommended Comfort
Trusted by foot health experts, Aerothotic sandals carry the APMA Seal of Acceptance — so you know they’re not just comfy, they’re good for your feet.
As Seen In
Questions? We’ve Got You Covered
Do these run true to size?
Do these run true to size?
Yes, order your usual sandal size. If you’re between sizes or have wider feet, we recommend sizing up.
Are they good for wide feet?
Are they good for wide feet?
The fit is a medium width, but the cushioned design adapts to most foot shapes. If you’re in between, size up for a more relaxed fit.
Can I wear them in water?
Can I wear them in water?
Yes! Our sandals are made with water-friendly materials that dry quickly and won’t lose shape.
Do they help with foot pain?
Do they help with foot pain?
Many of our customers find relief from everyday foot pain thanks to the arch support, cushioned heel cup, and shock-absorbing footbed.
What if they don’t work for me?
What if they don’t work for me?
No worries — you’re covered by our 30-Day Comfort Promise. Try them out, and if they’re not right for you, exchanges are free and easy.
Overall rating: 4.714286 / 5 from 7 reviews.
AI Generated Review Summary
Summary topics
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Review highlights
Reviews
The strap on this shoes
"The strap on this shoes is a little too itchy feeling for me. But they are new so not sure if they need stretched a little."
I love the shoes but
"I love the shoes but you advertise over $50 purchase is free shipping- I was still charged shipping. I emailed and called with no response."
Beautiful
"Beautiful"
I like them, need to
"I like them, need to get use to them there was a spot on the top of my foot that rubbed but I fixed it."
Plantar fasciitis approved
"Plantar fasciitis approved"
I recommend Opal! 10/10
"I was super excited when these flip flops arrived! I couldn't wait to pair them with all my summer outfits. They're cute and comfy, perfect for beach days."
