The Science of Air
Numadx inserts are built with cutting-edge materials — combining specialized polymers and pressurized air to deliver superior support and comfort throughout the day. Tuned by size and pressure-calibrated through real-world testing, they’re designed to serve both everyday movers and those seeking relief from foot, joint, or back pain.
Unlike traditional foam or gel inserts that break down and flatten over time, Numadx uses engineered inflation profiles to maintain responsiveness, absorb impact, and reduce fatigue. This durable, air-powered design helps you move better, longer — with comfort that lasts.
Step into the future of footwear with Numadx — where science meets support.
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Pneumatic Cushioning
What is pneumatic cushioning technology?
Pneumatic cushioning is using compressed pressurized air to soften impacts and absorb energy. It's commonly found in products including “bubble wrap”, shock absorbers, pressurized car tires, and other advanced industrial cushioning applications. It's used in industries where impact protection, shock absorption, and energy return are important. Sounds a lot like when you move, huh?
Why Haven’t I Seen Pneumatic Cushioning in Other Footwear Products?
You actually have! The flagship technology of the world’s largest athletic shoe brand is a form of pneumatic cushioning. Numadx, however, is the first to move this technology out of the shoe’s midsole and position it closer to the foot as a removable insert. Putting the pneumatic cushioning closer to your foot provides superior benefits over burying the technology in the mid-sole.
Moving Better at every Step of the Way
How are Numadx Inserts Superior Over Foams and Gels?
Foams and gels lose their effectiveness over time, providing less cushioning and energy absorption compared to pneumatic cushions. They also break down more quickly, absorb moisture and bacteria with use, and are harder to optimize for individual sizes or activity levels. Numadx inserts, on the other hand, maintain long-term performance, resist moisture, and are tunable to meet the needs of each user. Foams and gels are a one-size-fits-all approach. Wouldn't you want something that's tuned to you?
Why Do Numadx Inserts Look Different from Other Products?
Let’s face it—most foam and gel insoles on the market look alike and offer similar benefits, which can be confusing for consumers. Numadx inserts stand out with their unique design: pressurized, flat, and low-profile. They’re made to fit between the removable insole and the midsole of your shoe, delivering an unmatched level of energy absorption and comfort.
Why Isn't There Any Fabric on the inserts?
We intentionally avoid adding fabric to our inserts to prevent common issues like foot odors and bacteria buildup caused by moisture. Instead, our inserts are made from thermoplastic polyurethane, a durable, antimicrobial material that resists bacteria and keeps your feet fresher, longer. By eliminating fabric, we ensure a cleaner, more hygienic experience with every step.