Great combination bag fits on almost any rack front or rear, or can be slung over your shoulder (included strap is a bit short for crossbody) Padded, can keep cool things cool, about 6 by 12 by 7 high nominally 10 liters, with bottle pocket and a snap-closed pocket and a zip-closed pocket on the outside. The waterproof pack cover (bright yellow) is included in its own little pouch inside the main compartment. Stretchy bungee cords on top of bag let you fasten bulkier objects. Four strong velcro straps attach it to your rack. Easy to release as you take the bag into the office. Current model street/web price $58.