Aeron redefines XC performance through advanced construction and precision fit. The ripstop upper with TPU bumpers offers protection without added weight, while dual NUUN 001C dials and external Firmor reinforcement ensure secure, responsive support. A fast-adapting instep and UNUM tongue deliver a pressure-free fit, complemented by a tool-free heel adjuster for fine-tuned stability. The sole, with stiffness index 11 and generous rubber coverage, offers powerful traction and efficient energy transfer.Ripstop upper with rubber bumper offers lightweight durability and tear resistance for off-road protectionX2FC full carbon sole with stiffness 11 and integrated toe lugs ensure power transfer and impact supportNUUN 001C aero dials and adjustable instep deliver fast tension control and a secure, tailored fitHeel adjuster and Firmor X stabilize the foot for consistent performance and locked-in feelItem SpecificationsCleat Bolt Pattern2-BoltClosureVelcroColorBlackDefined ColorBlackGender/AgeMen'sShoe Size (EU)40 Sidi Aeron XC Clipless Mountain Shoes - Men's, Black Mountain Shoes EAN: 8017732764980