Returning in its most natural form is the 33-DFA , which has been enhanced with a new Seamless Construction upper to deliver an improved fit with greater breathability. Staying true to the most critical element of the shoe is the Natural33 Last, which mimics the shape of the foot and allows for a secure heel fit.
- AmpliFoam Engineered to maintain durability at softer densities, providing better flexibility, comfort, and platform adaptability ideal for natural running.
- FluidAxis Anatomically correct deep flex grooves have been aligned to the joints of the foot. This innovative construction enables the shoe to recognize, adapt, and respond to the athlete's exact load and positional change from first impact to toe-off.
- ComforDry Lasting This lasting material features plush underfoot comfort while providing excellent moisture management, high level breathability, and anti-microbial properties.
- Solyte Midsole Material A lighter weight midsole compound than ASICS' standard EVA and SpEVA . Also features enhanced cushioning and durability.
- Seamless Construction The use of seamless materials reduces the potential for irritation and friction caused by traditional stitches and seams.