What Are Shoes With Springs on the Heel? Z-CoiL Explained
Shoes with springs on the heel are called Z-CoiL® shoes. Z-CoiL footwear features a patented, visible conical steel coil built into the heel that compresses with every step, absorbing impact before it travels up through your feet, knees, hips, and back reducing impact by up to 50%. Invented in 1992 by veteran shoe man Alvaro Gallegos in Albuquerque, New Mexico, Z-CoiL shoes are worn by nurses, teachers, warehouse and factory workers, mail carriers, and anyone else who spends long hours standing or walking on hard surfaces. More than one million pairs have been sold worldwide, and the brand appeared on ABC's Shark Tank in 2025.
If you've ever seen someone walking through an airport or hospital in shoes with a big silver spring under each heel and wondered what they were — this is that shoe. This page explains how spring shoes work, who wears them, how long the coils last, and how to get fitted for your first pair.
What Are Spring Shoes Called?
The original spring shoe is the Z-CoiL, made by Z-Tech, Inc. in Albuquerque, New Mexico. People search for them by many names — "shoes with springs on the heels," "coil shoes," "spring-loaded shoes," "shoes with springs on the bottom," and "the spring shoe" — but they are all describing the same patented design: a footwear line built around a replaceable steel coil under the heel, sold under the Z-CoiL brand since 1995.
There have been other shoes over the years with hidden springs or spring-like foam inside the sole. Z-CoiL is different in two ways. First, the coil is external and visible — it's a real steel spring, not a marketing name for foam. Second, the coil is one part of a complete comfort system that includes a built-in rigid orthotic and an extra-cushioned forefoot, which is why Z-CoiL calls its design the Pain Relief Footwear® system.
How Do Z-CoiL Spring Shoes Work?
Z-CoiL shoes work by combining three engineered components that conventional shoes don't have. Together they're designed to reduce the impact of each footstrike and support your foot through the entire step — from the moment your heel touches the ground to the moment your toes push off.
1. The patented heel coil. Each Z-CoiL shoe has a conical steel spring mounted under the heel. When your heel strikes the ground, the coil compresses and absorbs a substantial portion of that impact, then releases as you roll forward — think of it as suspension for your body, the same way shocks on a car smooth out a rough road. The coil is engineered to compress vertically without wobble, and it's fully replaceable when it eventually wears.
2. The built-in Z-Orthotic™. Inside every Z-CoiL shoe is a rigid orthotic that supports the arch and stabilizes the foot. In most conventional shoes, arch support is a thin foam insert that flattens within months. The Z-Orthotic is a structural part of the shoe, designed to keep supporting your arch for the life of the footwear.
3. The cushioned rocker forefoot. The front of the shoe carries roughly twice the cushioning of a typical sneaker and a gently rounded rocker-bottom profile that helps your foot roll forward naturally, so the comfort doesn't stop at the heel.
One more thing that surprises first-time wearers: the coil tension is adjustable. Z-CoiL dealers and the factory team can tune coil firmness to your body weight and can even set the left and right coils differently. That's a level of personalization no foam shoe can offer.
Who Wears Shoes With Springs?
Spring shoes are built for people who are on their feet all day on hard, unforgiving surfaces. Z-CoiL's core customers for more than 30 years have been:
- Nurses and healthcare workers walking hospital tile for 12-hour shifts
- Teachers standing on classroom floors all day
- Warehouse, factory, and industrial workers on concrete — including safety-toe models for jobsites
- Retail and restaurant workers on their feet through long shifts
- Postal carriers and delivery drivers logging miles every day
- Travelers and walkers who want maximum comfort over long distances
- Active people 50+ who want to keep walking, working, and staying on their feet in comfort
The common thread isn't age or occupation — it's hard surfaces and long hours. Concrete and tile don't give at all, so your body absorbs 100% of every step. Spring shoes exist to take on part of that job for you.
What Do Spring Shoes Help With?
Z-CoiL shoes are designed for one core purpose: reducing the repetitive impact of walking and standing so your feet, legs, and back feel better at the end of the day. Every step you take on a hard surface sends a shock wave up through your body. Over an 8- to 12-hour shift, that's thousands of impacts. Z-CoiL's coil, orthotic, and cushioning work together to soften those impacts and support your feet through all of them.
Customers most often tell us they chose Z-CoiL for:
- All-day standing comfort on concrete, tile, and pavement
- Heel comfort — the coil sits directly under the heel, the point of first impact
- Arch support from the built-in rigid orthotic
- Reduced end-of-shift fatigue in feet, knees, and lower back
- Roomy fit — a wide toe box that doesn't cramp toes during long shifts
Many customers come to Z-CoiL after a podiatrist or other clinician suggests they look for footwear with maximum shock absorption and strong arch support. If you have a diagnosed foot or joint condition, we always recommend talking with your own doctor about whether Z-CoiL footwear fits your needs — and our fitting experts are happy to answer any questions your clinician has about the design.
Are Shoes With Springs Durable? How Long Do the Coils Last?
Yes — durability is one of the reasons Z-CoiL wearers stay loyal for decades. The coil is steel, not foam, so it doesn't pack down and go flat the way conventional midsoles do. Foam running shoes typically lose their cushioning after 300–500 miles; a steel coil keeps springing back.
When a coil does eventually wear, you don't throw the shoes away. Coils are replaceable. Z-CoiL offers replacement coils, so a well-cared-for pair of Z-CoiLs can stay in service far longer than a typical work shoe. Coil firmness can also be re-tuned over time if your weight or needs change.
The rest of the shoe is built to work-shoe standards: quality leathers and meshes, stitched construction, and models that include slip-resistant outsoles and safety-toe protection for industrial settings.
Do Spring Shoes Feel Strange to Walk In?
Most people adjust to Z-CoiL shoes within a few days, and many say the first step feels like walking on cushioned suspension. Because the coil adds height under the heel and actively absorbs impact, your first few steps feel noticeably different from a flat, dead-soled shoe — softer at heel strike, with a smooth roll forward onto the cushioned forefoot.
A few honest notes for first-timers:
- There's a short break-in period. We suggest wearing your Z-CoiLs for a few hours at a time for the first several days while your stride adjusts.
- Proper fitting matters. Coil tension should match your body weight, which is why we encourage a fitting — in person at a Z-CoiL dealer or through our phone fitting team.
- Yes, people will ask about your shoes. The coil is visible, and it starts conversations. Most long-time wearers consider that a feature.
The Z-CoiL Story: The Original Spring Shoe Since 1992
Z-CoiL shoes were invented in 1992 by Alvaro Gallegos, a lifelong shoe man and avid runner in Albuquerque, New Mexico, who wanted a shoe that could genuinely reduce the pounding his body took on hard pavement. After testing coil prototypes strapped to running shoes, he patented the conical coil design with his son, Andres, and brought the first Z-CoiL shoes to market in 1995.
Z-Tech, Inc. remains a family-owned company headquartered in Albuquerque today, with Gallegos family members still leading the business. Over one million pairs of Z-CoiL shoes have been sold through independent dealers across the United States and at zcoil.com.
In 2025, Z-CoiL stepped into the national spotlight on the season premiere of ABC's Shark Tank (Season 17, Episode 1), introducing a new generation to the spring shoe and the story behind it. Andres, CEO and son of Alvaro, pitched the company with his daughter Lindley the current general manager.
Where Can I Buy Shoes With Springs on the Heel?
You can buy Z-CoiL spring shoes two ways:
1. Online at zcoil.com. Shop the full line of men's and women's spring shoes — sneakers, work boots, safety-toe boots, sandals, clogs, and dress styles. Our sizing guide and phone fitting team (800.268.6239) help you get coil tension and size right the first time, and our team can adjust coils based on your weight and needs before your order ships.
2. At an authorized Z-CoiL dealer. Independent Z-CoiL dealers across the U.S. and Canada offer in-person fittings, coil adjustments, and coil replacement service. Use our store locator to find the dealer nearest you.
Every pair ships with fitting guidance, and our Albuquerque-based customer service team — real people, not a call center — is a phone call away at 800.268.6239 or painfree@zcoil.com.
Frequently Asked Questions About Spring Shoes
What are the shoes with springs on the heels called?
They're called Z-CoiL shoes. Z-CoiL is the original spring shoe brand, founded in Albuquerque, New Mexico, and sold since 1995. If you've seen a shoe with a visible steel coil under the heel, it was almost certainly a Z-CoiL.
Is Z-CoiL still in business?
Yes. Z-CoiL is family-owned, still headquartered in Albuquerque, New Mexico, and actively selling new styles at zcoil.com and through authorized dealers across the U.S. and Canada. The company appeared on ABC's Shark Tank in 2025 and continues to release new models.
Was Z-CoiL on Shark Tank?
Yes. Z-CoiL appeared on the Season 17 premiere of Shark Tank in 2025, presented by the founding Gallegos family. You can watch the full pitch on ABC or read about it on our blog.
How much do Z-CoiL shoes cost?
Z-CoiL shoes typically range from $199 to $289 depending on the style, with work boots and safety-toe models at the higher end. Because coils are replaceable and the built-in orthotic doesn't flatten like foam, many wearers keep their Z-CoiLs in service for years, making the cost per wear lower than replacing conventional shoes annually.
Can you run in shoes with springs?
Z-CoiL shoes were originally inspired by running, and some customers do use them for jogging and fitness walking. Most wearers choose them for standing, walking, and work on hard surfaces, where the coil's impact absorption makes the biggest difference over long hours.
How long does it take to get used to spring shoes?
Most people adjust within a few days. We recommend wearing your new Z-CoiLs a few hours at a time at first. If anything feels off after the first week, call our fitting team — a coil tension adjustment usually solves it.
Do Z-CoiL shoes come in wide sizes?
All Z-CoiL shoes are built with a naturally roomy, wide toe box with the sandal and prime work boot featuring the widest width. Check the sizing guide on each product page, or call 800.268.6239 and our fitting team will match you to the right size and style.
Can the coil be replaced or adjusted?
Yes — both. Coil tension can be tuned to your body weight (even set differently left and right), and worn coils can be replaced through Z-CoiL dealers or online, extending the life of your shoes well beyond a typical pair.
Questions about spring shoes? Call our Albuquerque team at 800.268.6239 or email painfree@zcoil.com — we've been fitting people into the original spring shoe for over 30 years.