Built to keep you cooler when the pace is high, the Nike ACG Radical AirFlow NXT long sleeve is one of Nike’s most advanced hot-weather running pieces to date.
Designed around the innovative Radical AirFlow fabric, this race-ready singlet uses an ultra-breathable open-hole construction to channel airflow directly to the skin, accelerating sweat evaporation and helping maximise the body's natural cooling process. The result is a lightweight, highly ventilated layer built for long efforts, hot conditions, and high-output running.

The soft knit fabric feels smooth against the skin despite its open structure, while fold-over elastic trims provide comfort and durability without adding unnecessary weight. Developed and refined through extensive athlete testing, the Radical AirFlow system was worn by elite Nike ACG trail runners throughout the 2025 season, with feedback from both laboratory and race environments helping shape the final product.  

We know the right fit matters. All of our men's and women's shoes are done in the their respective sex sizing. Unisex shoes are done in Men's US sizing, unless stated.

Use the guide below to help you choose the correct size across Unisex footwear.

Still unsure? Swing by the store or reach out to us at contact@runhavoc.com or (02) 4261 3816. Our team is here to help.

Footwear:

Be careful when choosing the correct size, as returns due to sizing will come at the buyer's expense.

Fit tips:

• Most shoes we carry are true to size
• Fit shoes firm in the width, with a thumb nail left in the length after your toe.

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