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You can refer to the charts when selecting sizes but please note that sizes cannot be guaranteed and might vary slightly between brands.
If you need any advice about sizing, please feel free to drop us a line at: service@sunnoss.com
The measurements in the description of individual products are taken only across the front side of the garment, not around the circumference (e.g. chest and waist).
If you can't find a completely satisfactory size in our size chart, don't worry! Feel free to contact us anytime at service@irispetal.com or through our online customer service. Our team is more than happy to provide personalized advice, recommend alternative styles, or assist with customization needs. Your comfort is our top priority!
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Fine-tuned for marathon pace and built to redefine what feels possible over 26.2 miles, the Nike Alphafly 3 represents the most advanced iteration of Nike’s flagship racing platform. Designed for road racing at the highest level, it combines propulsion, cushioning and efficiency in one streamlined package.
A double forefoot stack of Air Zoom units works in sync with a full-length carbon-fibre Flyplate to create a powerful lever effect, helping store and return energy with every stride. The slightly wider Flyplate geometry enhances both propulsion and stability, particularly through turns and when fatigue begins to build late in the race.
Underfoot, ultralight ZoomX foam runs the full length of the midsole and connects directly to the outsole for smoother transitions and optimised responsiveness. The result is a highly cushioned yet explosive ride that helps keep legs feeling fresher from the first mile to the final push.
The updated upper improves multidirectional containment and breathability, while notched laces and an integrated knit tongue with lofted padding help reduce lace pressure and secure the foot comfortably at race pace. Now the lightest Alphafly to date, the Alphafly 3 is built for runners chasing personal bests and breakthrough performances on race day.
Technical Specifications:
Intended Use: Road Racing
Support: Neutral
Width: Regular
Weight: Approx 218g
Drop: 8mm (40mm heel vs 32mm toe)
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