Headquartered in California, Neff was launched in 2002 as a snow and skate headwear brand, and has since expanded to become an active lifestyle and fashion company.
The brand is now looking to grow its European distribution.
KINC was hired on a retained basis to promote Neff across Europe using targeted PR.
The agency will also handle the selection and engagement of European brand ambassadors from the music and sports scenes.
Neff global ambassadors currently include rappers Snoop Dogg and Wiz Khalifa, and American basketball star Kevin Durant.
Kirsten Taylor, international marketing manager at Neff, said: "We are excited to have KINC on board with us in Europe. It understands our ‘Forever Fun’ platform and was best placed to translate that for us in Europe."
Paul Knipe, managing director of KINC, said: "We have been fans of Neff for many years and are really pleased the timing is right to work together on growing the brand’s exposure in Europe."