When The Road Is Wet And Sloppy, Be Prepared With The Ultralight Aero Shoe Cover - Designed To Slice Through Weather While Remaining Flexible Enough To Allow Your Feet To Move Freely So You Can Shave Off Seconds. The Ultralight Aero Shoe Cover slices through weather to help shave off the seconds. The new Ultralight Aero Shoe Cover not only protects your much-loved cycling shoes from road grime, the form-fitting Lycra® design reduces aerodynamic drag to give you an extra bit of speed when needed.