RedLine returns to reclaim the throne! Developed for those who put in the daily grind to be nothing but the very best, the updated RedLine continues the legacy with top of line materials and cutting-edge design. The clutch heel cup design drives the foot forward into the toe box and a spiral last holds the foot's position in an aggressive stance. Our next-generation power upper features a negative texture for a beasty grip on technical terrain. A lack of midsole allows the foot to flex when you're flexing on the competition.  "Pushing designs that will continue to challenge, motivate and inspire our community" - Obe Carrion   Details Patented Concave SoleDownturned and twisted profile for power and precisionStretchy and breathable tongue 3D expandable molded heel for a versatile fit made with climbing grade rubberClutch Heel strap to control heel tensionMolded Power Upper with negative texture for durability and frictionScience Friction 3.0 rubber sole Vegan-Friendly Specifications Stiffness: SoftUpper Material: Tek FlexClosure: Hook-and-loopRubber: Science Friction 3.0 and Science Friction R2 (Rand)Midsole: NoneProfile: AggressiveAsymmetry: Significant UK Sizing: Upsize 1 full size to find your US size