Castelli Bolero Aero Sleeve White

If you have a keen eye, you'll have noticed the lines running down the arms of pro riders when they race TTs. These aero ribs are Castelli's Bolero sleeves. The ribs create aerodynamic trip strips, making TT suits even faster. If you're ready to set your next PB, the Bolero sleeves are a must. Aero sleeves for aerodynamic gains.