Uploaded November 2025 | Updated September 2026, 2 weeks ago

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Ollie heads to the University of Hertfordshire to put some cutting-edge cooling technology to the test — designed by Ultra Cool Tech and Purpose Performance Wear — to see just how much managing body heat can boost your speed, endurance, and overall performance.

We’re talking lab testing, power data, core temperature tracking, and brutal time trials in a 30°C heat chamber (plus a little running torture for good measure).

Can cooling fabrics, water-retaining tech, and smart design really help you go faster — or is it just another gimmick? Find out how much difference cooling makes when you’re pushing 300 watts in the heat.

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