Castelli undersaddle xl saddle bagthis saddlebag has a light sleek profile that will let you forget its even there until you need it the xl version is enough to hold the essential spares you will need in the event of a puncture or mechanical features water and stain resistant materials water resistant zipper water resistant construction adjustable hook and loop attachment strap internal storage pocket reflective accents size 6x15x6 cmbuycastelli accessoriesfrom chain reaction cycles the