WorldTour-proven racing overshoes engineered with aerodynamic textiles in a second-skin fit and updated for a more secure fit. The RSR Speed Booties have been winning WorldTour races since they were prototypes. The S11 generation is the result of continuous WorldTour development updating the RSR pedigree with added silicone grip on the ankle while maintaining aerodynamic gains – measured in the wind tunnel and proven in the peloton. Integrated grip across the upper cuff maintains fit at a UCI-legal height. Composition Main fabric 82% Polyester 18%Elastane; Front part 90%Polyamide 10%Elastane with 100%Polyurethane coating   The finer details FEATURED FABRICS   The new 550CX warp-knit textile melts across your ankle and heel upgrading aerodynamics with inherent drag-reducing properties. The ultra-elastic Eva Kant textile sheathes the toe and forefoot in a drag-reducing second skin.   CONSTRUCTION/FIT   The epitome of our aerodynamic racingFit finished with a raw-cut Zero Cuff design that eliminates drag from zippers or hook-and-loop fasteners.