Perfect for around town and the necessities. With a main compartment large enough to fit a full face helmet, the OSi ST Magnetic Tank Bag is big enough but not too big. EXTERIOR POCKETS 3 Zippered; 1 Hook-and-loop closure MAGNETIC 10 fixed magnets hold the bag in place and a rubberized surface makes sure the bag does not move. Security strap secures mounting. EXPANDABLE BY DESIGN allows the bag to expand partially (at an angle) or fully (straight up) adding 5 liters of capacity for to suit storage needs. QUALITY ENGINEERING with Taped Seams for longer life, a clean interior and a watertight interior STORAGE GALORE Rider-facing exterior pouch allows quick access; interior mesh pockets (4) line interior sides; lid contains 3 levels of map pockets (1 zippered) and 3 pen holders; interior key ring clasp WIREPORT allows cables to pass through into/out of tank bag for access to electronic devices avoiding weather MAP POCKET is easy access with full view window in rain cover REFLECTIVE PANELS & PIPING on each side RAIN COVER INCLUDED PLUS Adjustable shoulder strap; oversized molded zipper pulls for use with gloves; heavy-duty plastic hardware LIMITED LIFETIME WARRANTY COLOR(S) Black/Gray DIMENSIONS: Main Compartment - 13 liters / 12” x 10”x 7” Expanded Main Compartment - 18 liters / 12” x 10” x 9.5” 3 Side Pockets - 3+ liters / 10" x 5" x 2" (2) & 6" x 5" x 2" (1)