The all-new Leatt GPX 5.5 FlexLock Enduro boot, a 3-year project with long term development and testing using Pro athletes from all over the world! The GPX 5.5 Enduro boot is a real head-turner when it comes to look and style, but the design brief was comfort and protection also. And now the Enduro version has an Enduro pattern for grip when pushing the bike or in tricky sections.