Sports scientists at Loughborough University have helped design one of the lightest pairs of football boots ever made.
The Velocita Pro boots, designed for sports equipment giant Umbro, weight just 165 grams - less than six ounces.
Dr Sean Mitchell and Dr Steph Forrester, academics at the Sports Technology Institute at Loughborough University, worked with their students on making a boot that would improve footballers' performance.
As well as allowing them to run faster and for longer with their low weight, the boots are designed to have more grip than normal football boots.
Dr Mitchell said: "We are particularly pleased with how this work has given us the opportunity to involve our best undergraduate and postgraduate students in cutting edge sports technology research that has real world impact for the sports industry, elite players and recreational enthusiasts.
"This is typical of our work within the institute and right at the heart of the Loughborough ethos.
"The boot has been designed to improve multi-directional speed and help players feel quicker on their feet for a full 90 minutes."
Developing the boot involved lots of tests involving footballers as the scientists worked to create a boot that was comfortable over a long period of time as well as improving performance.
Another challenge for the scientists has been making sure the studs on the shoe allow footballers to change direction quickly and run sideways as well as forwards.
Colin Lomas, footwear and equipment director at Umbro said: "Working closely with Loughborough allows us to test products from initial concept to the finished article with experts in biomechanics, engineering and sports science.
"Footballers don't run in straight lines, therefore the principle behind the Velocita was to create a boot which allows multi-directional speed.
"Every single aspect of the boot has a functional purpose geared towards this – from the unique configuration of the studs to the laces, which were flattened like runner's spikes.
"And whilst weight was an important factor, the boot has been specifically engineered to offer a level of comfort for 90 minutes and beyond."
The boots, which costs £130 a pair, are available now in three colours - Nimbus Cloud, Dark Shadow and Pink Glo.