You put the insole in. You walk around. Nothing happens.
Not uncomfortable — just nothing. The arch support you paid for is somewhere down there, below your foot, and your foot is doing what it did before: landing on the heel, landing on the ball, bridging over the middle with nothing underneath.
If that is your experience with insoles, you probably have a high arch. And what you have been buying was not built for you.
Why most insoles do not reach
Most feet sit somewhere in the middle, so most insoles are built for somewhere in the middle. That is a reasonable business decision and a bad outcome for about one person in five. An arch support that stops short of your arch is not weak support — it is no support. Your foot passes over the top of it and never makes contact.
Which is why "it feels fine, but nothing changed" is the most common thing a high-arched person writes in a review of a mainstream insole.
PerseveranX is built for the tall end. Every model in the line uses the same arch, shaped to run the length of the arch and make contact along it rather than poking at one point in the middle.
And it does not feel like a ramp
That is the fair worry, and it comes from real experience — firm high-arch insoles often feel like standing on a wedge. Two things in how ours is built keep it from behaving that way.
Your arch rests on foam, not on structure. The top layer is open-cell foam; the support sits underneath it. And that support is not a solid plate. Most insoles use a continuous TPU shell across the arch and heel — the simple way to get stiffness, and the reason they feel rigid. Ours is open through the middle: the frame wraps the heel and extends forward along the inside of the arch as a U, carrying load along the edges and leaving the centre unbridged. We did not soften the material to get that give. It is the stiffest TPU we use. We changed its shape instead.
Turn one over and you can see straight through the arch.
The part that decides whether it lasts
Almost every insole is built from closed-cell foam — sealed gas bubbles in a rubber matrix. Inexpensive, molds well, feels excellent new. Under repeated load those bubble walls collapse and stay collapsed. The industry calls it pack-out.
For a high arch it costs double. A medium foot that loses three millimetres of arch still has contact. A high arch that loses three millimetres is back to a gap — nothing under the middle of the foot again, with an insole that still looks new.
We call it the Pack-Out Problem, and it is the reason your last pair stopped working.
PerseveranX uses open-cell foam. The cells are interconnected, so air moves in and out as you load and unload it. It displaces rather than crushes, and recovers between steps. Press it with your thumb and watch it come back. Then press the insole currently in your shoe.
What changes between our five models is not the arch. It is the foam over it.
Which one to start with: If this is your first supportive insole, start with Embrace — softest underfoot, easiest adjustment. If you want energy back rather than cushioning, choose Bouncy. If your day involves landing hard — ladders, stairs, concrete — HoneyComb firms up on impact and stays soft the rest of the time.
FAQ
How do I know if I have high arches?
Wet the bottom of your foot and step onto a paper bag. A high arch leaves a narrow band connecting heel and forefoot, or no connection at all. A flat foot leaves nearly the whole print.
What is the actual arch height?
35mm, measured to the top of the finished insole — the upper 5mm of that is foam (4mm on Fusion). For reference, insoles built for high arches generally sit above 30mm, and standard insoles sit well below it.
What if my arches are medium?
Plenty of people with a medium arch are comfortable in ours — the foam layer and the open frame take the edge off the height. Firm support that holds is useful at almost any arch height. Give it a week before you judge it.
How long before it feels normal?
Three to five days for most people. If you are coming from insoles that never touched your arch, day one will feel like a lot. Wear them a few hours at a time to start.
