Foam cushioning
Foam compresses under impact
Foam can feel soft at first, but repeated impact causes it to compress and lose its protective response.
Suspension for the 7,000 steps you take every day.
Z-CoiL replaces the heel with a steel spring that compresses an average of one inch and returns 50% of the impact back to you. Made to relieve foot, leg, and back pain — proven in independent lab testing and on over a million pairs of feet since 1992.
As seen on
Your shoes give out before you do.
The average American spends 55% of the workday standing or walking. If you're a nurse, a teacher, or on a warehouse floor, it's closer to all of it — and every step sends a shock up through your heel into your knees, hips, and back.
Foam softens that shock for a few months. Then it flattens, and the pain comes back. Impact is the primary cause of foot, leg, and back pain, and foam was never built to stop it.
The coil vs. foam
Real impact protection is mechanical, not foam.
Z-CoiL mechanical protection
A coil absorbs impact mechanically
The Z-CoiL coil is designed to absorb impact through controlled mechanical movement, helping reduce stress with every step.
The system
Three parts. One pain relief system.
The coil spring
Absorbs shock and returns energy with every step.
The built-in orthotic
Supports your foot from heel to toe for all-day comfort.
The rocker forefoot
Helps your foot roll forward naturally as you move.
The proof
Tested at Sandia National Laboratories.
Independent researchers at Sandia, Los Alamos, and New Mexico Highlands University measured what happens when you walk on a spring instead of foam.
1 in.
average compression per step
50%
of your impact returned to you
17%
lower peak impact jogging, 13% walking
Find your relief
Built for the pain you're walking with.
Z-CoiL wearers come to us for a reason. Find yours.
Plantar fasciitis
Supportive cushioning and a spring-loaded heel can help make every step feel more comfortable.
Explore plantar fasciitis reliefHeel spurs
Discover footwear designed to reduce everyday impact and help you stay in motion.
Explore heel spur reliefFused ankles
Flexible comfort and a stable foundation help support the way you move through your day.
Explore fused ankle reliefLeg and back pain
A more supportive stride can help you take on work, errands, and life with greater comfort.
Explore allCustomer voice
They don't just buy them. They stay.
Half of first-time Z-CoiL customers buy a second pair within a year.
★★★★★
“I have worn the shoes since 2001… After working as nurse and being on my feet for 12 hours and no pain in my legs, feet or back… I have 6 pair and getting ready to order a summer pair.”
Nurse · Verified purchase · Wearing since 2001, six pairs
★★★★★
“I was ready for a wheel chair because my feet hurt so bad. Inserts were no longer doing the job… That was about 10 years ago… Right now I own 4 pair. They are the only reason I am still walking.”
Verified purchase · Freedom Classic · Ten years, four pairs
★★★★★
“This is my second pair in 2 years… I had terrible foot pain that left me barely able to walk… therapy didn't help. A few days wearing these and my foot pain was better… I will never go back to any other kind of shoes.”
Verified purchase · Second pair
Since 1992
Three generations. One idea.
Built around a simple idea: better comfort for every step.
Frequently Asked Questions
Do they feel bouncy?
Do they feel bouncy?
No. The coil compresses under your heel; it doesn't launch you. Most people describe it as walking on thick, firm carpet.
How fast will I feel a difference?
How fast will I feel a difference?
Many customers notice it on day one. For long-standing pain, give it a week of steady wear — and you have 30 days to decide.
Are they heavy?
Are they heavy?
Slightly heavier than a normal shoe, but you're used to it within a day.
What if they're not for me?
What if they're not for me?
Wear them for 30 days. If they're not right, send them back in any condition.Full details in our return policy.
Can I use my HSA or FSA?
Can I use my HSA or FSA?
Yes, through Truemedat checkout.