ION Extension Tail Bag S - 7 to 15 LiterION Extension Tail Bag S 7 to 15 Liter Ideal for small and sporty bikes Expandable via zipper from 7 to 15 liters and therefore offers enough storage for drinks, a change of clothes, and other necessities for day trips and short rides The compact bag can be lashed onto riveted D rings with 4 point attachment with included loop straps Two straps with hook and loop closure, along with a slot on the underside, enable fast and secure attachment to a seat