Z-CoiL® Pain Relief Footwear's revolutionary technology isn't really revolutionary at all. It's evolutionary. The Liberty Grey Men's and Women's Shoe is engineered to help you stride the way the human body was designed to ... in an environment that the human body was not designed for.
This shoe is the only shoe that offers both the impact reduction and stability you need for pain relief, injury prevention and whole body support. Z-CoiL shoes have the patented conical spring in the heel, which reduces impact by 40-60% (according to tests performed by the American Department of Energy) and provides energy return, reducing fatigue. The patented Z-Orthotic™ stabilizes tendons and ligaments. The rocker bottom sole assists forward motion and limits movement during toe-off. Flex line at the forefront of the foot encourages bending at the ball of the foot. Cushioning in the forefoot protects delicate metatarsal/forefoot joints, ligaments and bones.
Preventing Stress Injury and Providing Relief
Humans propel themselves through the concrete jungle the same way they have for thousands of years: heel strike → full forefoot load → heel lift → toe off. During a normal gait cycle, your heel makes contact and immediately redistributes the force - twice your body weight on each foot - up along the side of your foot, the part of your foot designed to actually absorb impact and transfer energy to continue forward motion. However, not all impact is transferred up your foot. Much energy is transferred along what chiropractors call the kinetic chain: heels → ankles → shins → knees → thighs → hips → pelvic girdle/lower back. Unlike the environments our ancestors walked, today's concrete and other hard surfaces are much less forgiving, resulting in significantly more stress to the body.
Every day we experience thousands of collisions with the ground. The greater impact delivered up the kinetic chain, sometimes exacerbated by an improper gait cycle (over-pronation or supination), compromise the human body's ability to absorb and redistribute stress forces, causing injuries. Preventing stress injury and providing relief for existing injuries requires impact reduction, i.e., footwear that actually limits the amount of force that travels up the kinetic chain. However, cushioning impact alone will not ensure healthy joints and pain relief. Shoes that offer extra padding actually encourage atrophy in the muscles of the foot. Weak muscles can lead to a number of compensating movements, many of which direct stress forces to areas of the foot that are not designed to absorb impact.
Unfortunately, most modern footwear has taken an either-or approach to solving the problem of increased impact along the kinetic chain. Either they provide cushiony soles to reduce the force of impact but allow the flexibility for soft tissues to move outside a normal range of motion, or they provide a rigid sole to keep the foot (and stress forces) in a natural range of motion but with very little impact-absorption, resulting in high impact all the way up the kinetic chain.
The unique replaceable conical coil design reduces impact up to 60% more than conventional shoes. And, since impact is the primary cause of foot, leg and back pain, your body will notice an immediate difference. When the rubber heel pad wears out on the spring, you can simply replace the spring unit (open or enclosed) rather than replace your Z-CoiL! This saves money and reduces unnecessary waste in landfills.
The Z-CoiL spring, Z-orthotic and rocker bottom sole
Style / Version
There are many styles and colors from which to choose.
Other styles include colors such as, classic-black, sky-blue, fuchsia, grey, navy-white, and classic-white.
Product Details / Specifications
- Helps in alleviating painful conditions such as arthritis, sciatica, heel spurs, plantar fasciitis, back pain
- Replaceable coils
- Built-in Z-Orthotic®
- Thick forefoot cushioning
- Wide toe box
- Flex line & rocker bottom
- 3/4-inch cushioning
- Made in Korea
- Women's size: 6 - 10
- Men's size: 8 - 14
Frequently Asked Questions
Products sold online thru Z-coil.com are covered 90-days from date of purchase.
We also offer a trial period of 30-days so you can be sure Z-CoiL is for you. We ask that you wear them during your regular schedule every day. If they do not perform as we promise, return in used condition for a full refund. Click here to read more: Risk-Free, 30-Day Trial Period.
Where to Purchase
What Comes in the Box
Liberty Grey Men's and/or Women's Shoe (as ordered)