Sirrus X 4.0 Shoe covers they seamlessly adapt to your

they seamlessly adapt to your every move

Top of hand is constructed from stretchable mesh for increased breathability

and integrated thigh pockets

Not only does light weight make for faster climbing

protective

Sirrus X 4.0 Shoe covers they seamlessly adapt to yourOffering 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