Performance Springsoles · Made in the USA
Sprint faster. Jump higher. Dominate every rep.
Patented, ultra-thin Springbak® Springsoles go under the insole of the shoes you already trust — 3/32nds of an inch of the most resilient material in the world.
Explosive Response
Butadiene rubber returns roughly 15% more energy than any other material.
Enhanced Stability
Force plate testing showed more than twice the force needed to displace the athlete.
Four U.S. Patents
The first patents ever issued for performance-enhancing shoe components.
Insoles by sport
Find your sport
Movement demands, fitting notes and training for the shoes, cleats and spikes you already compete in.
The Edge
Sports performance desk
Football · Speed
The .15 Nobody Talks About
NFL combine scouts deduct fifteen hundredths of a second for turf. Here is what that number really tells you about your playing surface.
5 min read
Basketball · Vertical
Your Vertical Is a Ground Problem
You cannot jump higher than the ground lets you push. A field guide to force, contact time, and the inches hiding in your takeoff.
6 min read
All Sports · Mechanics
Fourth-Quarter Mechanics
Form does not fail all at once. It erodes. Here is how fatigue rewrites your movement — and how to keep your last rep looking like your first.
5 min read
Soccer · Speed
The First Three Steps
Nobody in your sport runs 40 yards in a straight line. The acceleration that decides games happens in about a yard and a half.
4 min read
All Sports · Mechanics
What the Patents Actually Cover
Four U.S. patents, six years of development, and one material claim worth understanding before you buy anything for your feet.
6 min read
Train
Programs built around ground contact
6 weeks · 3x / week
Speed & Acceleration
Six weeks of short, sharp work aimed at footplant time and stride length — the two levers that actually move a 40 time.
8 weeks · 3x / week
Vertical Jump Block
Eight weeks of force production, plant-leg stability, and honest testing. Built for athletes who need inches, not opinions.
12 weeks · 2x / week
In-Season Strength
Two days a week to keep what you built in the off-season, without stealing anything from Friday night.
Take the Springbak® Challenge
Baseline your vertical and your sprint times, change one variable, and re-test. Log every attempt in Athlete Tools — no account needed.
Open athlete tools