99.6%
Metal feel. Loop comfort.
-
Milanese
Refined
Not flexible
- No stretch
- Magnet loosens
- Pulls hair
-
Solo Loop
Effortless
Not versatile
- Stretch fades
- Traps water
- Too casual
-
Braided Loop
Comfortable
Not carefree
- Holds sweat
- Slow to dry
- Loosens
So we built One Flex.
No buckle. No clasp. No adjustment.
Here's the data.
Every claim, tested.
316stainless steel
Alloy grade
Skin-contact ratedSafe
Skin friendly
Nickel-safe for daily wear1.3oz
Band weight
On the 42 mm size48h
Corrosion resistance
5% salt spray, finish intactWear it through the whole day.
One Flex for work, workouts, and water.
Won't look out of place.
Interviews, weddings, dinners.
Won't scratch or dig in.
Lifts, runs, rows.
Won't absorb a drop.
Swim, shower, dive.Sizing is the easy part.
Nine sizes per case, on Apple's 3–11 Solo Loop scale.
Already wear a Solo Loop?
Your number carries over. A 7 is a 7.
New to loop sizes?
Measure your wrist and follow our size guide.
Not sure you got it right?
Order your best fit. First exchange is free.
Find your band size.
Nine sizes, on Apple’s 3–11 Solo Loop scale. It takes about a minute.
How would you like to measure?
Either way works. The paper tool prints your size directly; a tape measure gives us a number to convert.
Print at 100%. Do not scale to fit.A resized print gives the wrong number.
Download the tool (PDF): US Letter A4
- 1
Cut the tool out. Position the wider end where you would wear your watch — sticky tape helps hold it there. - 2
Wrap it tightly around your wrist. It should feel snug and not slide up or down. - 3
Read the number the arrows point to. That is your band size. - 4
If the arrows land on a line, take the smaller of the two numbers.
Use a tailor’s measuring tape, or a strip of paper and a ruler.
- 1If you have a tailor’s measuring tape, wrap it tightly where you wear your watch and read the number. Skip to the next step only if you do not have one.
- 2Otherwise cut a narrow strip of paper, about 0.5 in / 1.3 cm wide, the full length of the sheet.
- 3
Wrap the strip tightly around your wrist. Tape the starting edge down so it cannot shift. - 4
Mark the strip with a pen exactly where it overlaps. - 5
Measure from the starting edge to your mark. Be exact — do not round up.
Select your size.
Same numbering as Apple’s Solo Loop.
Enter your measurement.
Read it off the tape exactly. Rounding up is the most common way to end up a size too big.
Wrist circumference
in.
cm
Your band size
—
Shop One Flex→Between two sizes? Take the smaller one — the band stretches. And your first size exchange is free either way.
- Free size exchangeFirst one free, within 30 days
- 30-day easy returnsFull refund, from delivery day
- Designed to endureBuilt for everyday use
- Sizing helpTalk to a real person→
Early testers, in their own words.
“It goes on like my Solo Loop and looks right with a blazer. I’ve stopped switching bands for client days.”
“Edges felt a bit rough sliding on (CS said fixes are coming), but fits great with zero hair pinching. Overall, really solid.”
“Three weeks of lifting, and it still fits like it did on day one.”
“My Milanese band used to loosen every morning, the One Flex is way more convenient.”