Talis Plus offers not only easily accessible 8 liters of interior storage on your rack but an additional 7 liter for flexible use by fold-out side pockets and upper extension. Numerous zippered pockets mesh pockets reflector stripes and an included rain cover provide safety and keep your things organized. Large open interior with multiple mesh and zippered pockets for organized storage. Carry handle and adjustable/removable shoulder strap allow easy off-the-bike transportation. Reflective stripe accents provide additional visibility. Compatible with Racktime 2.0 racks only. Dimensions without expansion: 15 x 9.8 x 10.2`. Dimensions with pannier expansion: 15 x 12 x 10.2`. Cubic inches without expansion: 488. Cubic inches with expansion: 915