Di2 Battery BT-DN300 Hydration The KOO Supernova have a

The KOO Supernova have a versatile design for running

This FINA-approved style smoothes the body into a streamlined shape from the waist to the knees with the added benefit of no stitching for zero chafing and dragging

Comfortable rubber coated handle improves grip

Waterproof Commuter Footwear Protection

Di2 Battery BT-DN300 Hydration The KOO Supernova have aThe new DN300 battery features the same waterproof design that Di2 users have loved for generations. Now with 3 ports, it delivers stable power to Shimano's 12 speed road derailleurs and shifters (if a fully wired option is selected). With the same size as its predecessor, the slim DN300 battery can be housed inside seat posts or frames ensuring a clean aesthetic. Now with 3 ports, the DN300 simplifies wiring to front and rear derailleurs, supplying