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The science begins with the resilient behavior of the Springbak® material.

1. Force Is Applied

As you run, jump, plant, lift, or change direction, your foot applies force through the shoe and into the playing or training surface.

2. The Material Responds

The Springbak® platform compresses and changes shape slightly beneath that load. This allows the material to temporarily store a portion of the mechanical energy applied to it.

3. The Platform Recovers

As pressure is released, the resilient material moves back toward its original shape, returning a portion of that stored energy through the footwear.

4. The Process Repeats

This compress-and-recover action occurs repeatedly during every stride, takeoff, landing, cut, and repetition.

Springbak® does not contain mechanical springs, air chambers, electronics, or bulky cushioning structures. The responsive action comes from the physical characteristics of the cured rubber material itself.

Apply force. Compress. Recover. Repeat.

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An Insole Shape With a Midsole Function

Springbak® is commonly described as a performance insole because it is shaped like an insole, installs inside the shoe, and is easy for customers to understand.

Technically, however, Springbak® works differently from an ordinary replacement insole.

The padded insole already inside your shoe remains directly beneath your foot, continuing to provide its familiar cushioning and comfort. Springbak® is placed underneath it, where it creates an additional resilient layer between the existing insole and the structure of the shoe.

That is why we describe Springbak® as an:

Ultra-Thin Midsole Performance Platform

This unique placement allows Springbak® to work with the footwear you already wear instead of replacing the comfort layer beneath your foot.

It installs like an insole—but performs as a midsole layer beneath your feet.

The Material Behind the Movement

Springbak® technology was developed through a family of four issued U.S. patents covering performance- enhancing shoe inserts, insoles, midsoles, sole portions, and related footwear components.

The patent documents describe cured, cross-linked compositions using high-cis 1,4-polybutadiene and other resilient rubbers, including natural rubber. These materials were selected for their ability to deform under pressure and recover as the force is released.

The patents also describe several possible positions and constructions within footwear, including:

• Beneath the shoe’s existing insole
• Within an insole or midsole region
• Under the ball of the foot
• As a full-length shoe insert
• As a component integrated directly into manufactured footwear

That history is important because Springbak® was not developed as another thick comfort insert. It was developed as a responsive footwear component intended to work beneath athletic movement. Explore Our Four U.S. Patents

Why Placement Matters

Where a performance material sits inside a shoe can be just as important as what the material is made from.

Springbak® is placed beneath the existing padded insole rather than directly against the foot. This allows the shoe’s original insole to continue doing its job while the Springbak® platform provides a separate responsive layer underneath.

This two-layer approach helps preserve:

• The familiar feel of your footwear
• The cushioning already built into the shoe
• The support provided by the original insole
• A secure connection between the foot and footwear
• A low-profile fit without unnecessary bulk

Springbak® can therefore be used in many properly fitted athletic shoes, cleats, training shoes, golf shoes, work footwear, and other active footwear.

Designed for Athletic Movement

Springbak® Springsoles are designed for movements that require the athlete to repeatedly apply and release force through the feet.

That includes:

• Sprinting and acceleration
• Jumping and explosive takeoffs
• Cutting and lateral movement
• Planting and changing direction
• Lifting and strength training
• Striking, swinging and rotating
• Walking, standing, and active work
• Repeated practices, drills, and competition

Springbak® does not replace proper footwear, coaching, conditioning, strength, or technique. It is designed to complement the work the athlete is already putting into performance.

Your preparation creates the athlete. Springbak® supports the foundation beneath the movement.

From Patented Technology to Real-World Performance

The Springbak® patent documents describe historical athletic evaluations involving running, jumping, and other performance movements. The patent family also discusses the use of Springbak®-type components as insoles, midsoles, and shoe inserts positioned within athletic footwear.

Beyond the patent history, athletes, NCAA coaches, performance professionals, and customers have shared their personal experiences using or evaluating Springbak® Springsoles.

Every athlete is different. The clearest way to understand Springbak® is to compare it inside the same footwear, during the same movement, under the same conditions.

Read Athlete and Coach Testimonials

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