Specialized Sirrus X 4.0 Backpacks & Duffle Bags Back Panel: 70% Wool

Back Panel: 70% Wool

Mount Hood is at once the most recognizable icon in Oregon and yet it is little known by the multitudes that live in its shadow

The robust FlatValve ensures quick inflation and deflation

back and straps

Specialized Sirrus X 4.0 Backpacks & Duffle Bags Back Panel: 70% WoolOffering 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