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 meshFixed shin plateMicro adjustable bucklesAnatomically shaped heelAdjustable calf systemRubber soleNylon inner sole with removable arh support