Why does the first step hurt the most?
It's 6am. Your foot hits the floor and a stab shoots through your heel — like stepping on a nail, or a jagged stone in the arch. It eases as you limp around, then comes right back every time you stand after sitting.
You've tried it all: custom orthotics, night splints, rolling a frozen bottle, endless calf stretches. None of it lasted — because none of it released the real culprit. The pain shows up at the heel, but it's pulled there by a tight, locked calf and plantar fascia upstream. Treat the heel alone, and it keeps coming back.
Lift the locked fascia
Reverse-pressure suction lifts the tight plantar fascia and calf tissue and pulls the layers apart — decompression that downward pressure can't reach. It floods the starved tissue with fresh blood (up to 16.7×, Frontiers, 2020).
Warm the calf loose ~122°F
Gentle warmth up to ~122°F helps the locked calf relax and eases the tension it pulls through the heel, so the fascia can let go.
660nm red light
Built-in 660nm red light — the wavelength studied for supporting circulation and muscle recovery — works in the treated calf and arch while the suction holds.
12-level rhythmic vibration
Twenty levels of rhythmic vibration coax a stubborn, guarded calf to relax — supporting deeper release. Start gentle and build up as it loosens.
Used the night before, suction and heat help release the calf so the fascia isn't as tight at dawn.
A quick session loosens the calf so standing doesn't re-trigger the heel as hard.
Lift and warm the calf and arch after a shift to ease the day's built-up tension.
Use it on recovery days to keep the calf loose and support blood flow to the area.
Unlock it in 15 minutes — 3 steps.
Tested on plantar-fasciitis pain
In a clinical trial, cupping reduced plantar-fasciitis pain and improved function (Ge et al., 2017) — the exact pain this targets.
Floods the starved tissue
Suction draws fresh blood into the tight, under-circulated calf and fascia — research shows local blood flow can surge up to 16.7× (Frontiers, 2020).
From Hippocrates to Olympians
Cupping has eased muscles for over 3,500 years — used by Hippocrates and seen on Michael Phelps at the Rio 2016 Olympics. What's old is proven new again.
Plantar sufferers, in their own words.
Verified Cordia customers who started with that first-step stab.
Why Cordia, not another insole.
Orthotics, night splints and frozen bottles cushion or numb the heel. Cordia releases the locked calf and fascia behind it.
|   | Cordia | Others |
|---|---|---|
| Releases the calf, not just heel | ||
| Targets the cause, not symptom | ||
| Heat + 660nm red light built in | ||
| Boosts blood flow to the fascia | ||
| 12 adjustable intensity levels | ||
| 2-yr warranty + 30-day guarantee |
Questions, answered.
Is it safe? Anyone who shouldn't use it?
Is it safe? Anyone who shouldn't use it?
Yes — it's temperature-controlled with 12 adjustable levels, so start low and slow. Avoid using it over varicose veins, blood clots, broken or numb skin, or while pregnant, and check with your doctor first if you have diabetes or neuropathy affecting the feet. Cordia is a wellness device, not a medical device; results vary.
How is this different from my orthotics?
How is this different from my orthotics?
Orthotics and night splints support or cushion the heel and arch. Cordia works upstream — it helps release the tight, locked calf and plantar fascia that pull on the heel in the first place. Many people use both together.
Will it hurt, or leave marks?
Will it hurt, or leave marks?
It shouldn't hurt — begin gentle and increase as the calf loosens. Light round marks can appear on the calf; they're a normal sign of increased blood flow and usually fade within a few hours to a few days.
How soon might I feel a difference?
How soon might I feel a difference?
Many people feel looser after the first few sessions, but plantar tension builds up over months. Used about 15 minutes nightly, give it consistent days to weeks — it works best as a daily habit, not a one-off.
What if it doesn't work? How fast does it ship?
What if it doesn't work? How fast does it ship?
Try it for 30 days. If you don't feel real relief, send it back for a full refund — free return shipping, no restocking fee. It's also covered by a 2-year warranty. Orders ship in about 7–15 days.
Try it 30 days — or your money back.
Use Cordia nightly for 30 days. If your first step isn't easier, send it back for a full refund — free return shipping, no restocking fee, no questions asked. Results, or your money back.
Every Cordia comes with the device, 3 interchangeable cup heads, a USB-C charging cable and a manual — backed by a 2-year warranty: if it stops working, we replace it free.