Sirrus X 4.0 Shoe covers Not only does light weight

Not only does light weight make for faster climbing

Top of hand is constructed from stretchable mesh for increased breathability

Put it together

and integrated thigh pockets

and they're shaped and structured to ensure that their contents won't ever come bouncing out

Sirrus X 4.0 Shoe covers Not only does light weightOffering an unprecedented combination of comfort, efficiency, and nimble handling, the Sirrus X excels on pavement, dirt, and any terrain in between. SMOOTH; COMFORTABLE, AND EFFICIENT: Sirrus X provides the smoothest ride in its class. With bigger, confidence inspiring tires, a slightly more upright riding position, and a super intuitive one by drivetrain. RIDER FIRST ENGINEERED: Like all Specialized performance bikes, the geometry of each frame is