
A New Era of Running Gear Innovation
When it comes to innovation in running gear, the spotlight is often on shoes, especially with the rise of carbon plate technology that has revolutionized performance. However, the advancements in running apparel are just as impressive and are beginning to capture attention.
Nike, a leader in athletic wear, has recently introduced a new piece of running gear that's making waves: the Radical AirFlow garment. This t-shirt is designed to keep runners cool and comfortable during long-distance runs, particularly on trails. The top has already proven its effectiveness through rigorous testing by Nike athletes, including Caleb Olson, who wore it while winning the Western States 100-mile race in June.
A Shirt Full of Holes
The Radical AirFlow top uses a unique material called Radical AirFlow, which features numerous holes to enhance airflow and speed up sweat evaporation. This design is inspired by the Bernoulli Principle of fluid dynamics, specifically the Venturi Effect. Every element of the shirt has been carefully considered to promote optimal airflow to the skin.
Jahan Behbahany, Senior Director of Nike Apparel Innovation, explained the development process: “We tried all kinds of airduct configurations, sizes, and zonal placements throughout the testing and development. We found that a funnel-shaped construction of larger to smaller gradient holes, uniformly placed, would best ‘funnel’ and accelerate air to the skin.”
In addition to the smaller holes covering the entire top, there are larger cutouts under the arms and at the elbows, which provide extra ventilation and comfort. These features help reduce the risk of chafing in sensitive areas. The cropped design also improves airflow to the abdomen, making it easier for athletes to access their waist belt during ultramarathons.
The materials used in the top are designed to dry quickly and absorb less sweat and water than traditional tops, further enhancing comfort during long runs.
The Future of Trail Running
While the Radical AirFlow top may not be the most conventional choice for everyday runners, its benefits could make it an appealing option for those looking to improve performance. However, it will not be available to the general public until 2026. In 2025, only Nike elite athletes will have access to the top as it continues to be refined for its retail launch next year.
Alongside the innovative top, Nike has also launched the ACG Ultrafly, a trail-running shoe that builds upon the success of the previous model. This new version is lighter and more flexible, thanks to a redesigned carbon plate that allows for greater flexibility on uneven terrain. The upper has also been updated to be more breathable and to drain water faster.
The midsole remains composed of Nike’s springy ZoomX foam, and the sockliner is made from the same material. A Vibram Litebase outsole ensures grip on various surfaces, making the ACG Ultrafly suitable for a wide range of trail conditions.
Like the Radical AirFlow top, the ACG Ultrafly will not be available for purchase until 2026. The price has yet to be announced, but it is expected to be similar to the $270 / £230 price tag of the previous model.
As Nike continues to push the boundaries of running gear, both in terms of footwear and apparel, it's clear that the future of running is being redefined. Whether it's through groundbreaking shoe technology or innovative clothing designs, the brand is setting new standards for performance and comfort.





