The Rex was developed through research, laboratory tests and ‘on the track’ testing thanks to Sidi’s Moto-GP riders’ input, all to offer you a brilliant performance during your rides. An excellent choice for every rider that is looking for a protective yet breathable boot, with a versatile and extremely comfortable fit not to mention an easy entry.Features:Upper in full grain leather and loricaLined with cambrelle and air teflon meshReplaceable shin plateMicro adjustable bucklesAnatomically shaped heelAdjustable calf systemDuel flex systemToe areaMetatarsus protectionNylon inner sole with removable arh support