The Course 2LS perfects fit, increases comfort, reduces weight, improves power transfer, operates fast, and provides long-lasting durability. The Boa Closure System “dials-in” to a more precise fit by evenly distributing pressure and reducing pressure points. The Boa reel system offers infinite degrees of fine-tuning and with dual reels on the Course 2LS shoe, varying amounts of security and tension can be provided by individual dials to the cuneiform bones and metatarsal bones. The Course 2LS Shoe has a patented multi-vent system that intakes air via vents in the sole, channels airflow through the sole of the shoe via two internal channels, and evacuates the air through another vent in the sole. The Ex0-Jet Carbon Outsole is constructed of hot melt carbon which means that the carbon fibers used have been further processed making them not only lighter but thinner. For the end user, this creates a shoe that is lighter, stronger and closer to the pedal. Increased power transfer is achieved not only through the Carbon HM outsole but the HRS-300 system. This system has a heel that is injected with nylon. Injected nylon is an amazingly resistant material that has an extremely low coefficient of friction so it perfectly secures the heel in place, optimizes fit, and reduces loss of power from slippage. The seamless microfiber upper is ventilated with the use of steel mesh.