Nathan AP Pro, White/Grey/Orange 22oz/650 ml aerobar hydration system Vertically self-adjusting articulating arms stretch to fit any length or positioning of bars - with no rubber bands or zip ties needed Streamlined horizontal positioning reduces turbulence between your arms Replenish fluids and minimize spillage using Quick-Fill Port without breaking cadence or coming out of aero tuck position Deck ring allows rider to mount an inspiration board on the deck of bottle