Travel on bike or foot with all of your gear handy in the Timbuk2 Colby Shoulder Bag. Featuring an exterior of durable twill made from recycled plastic bottles, this women's bike bag is lined with a waterproof fabric to protect your belongings. Two hook-and-loop straps let you attach it to your bike's handlebars, while a back slash pocket keeps the shoulder strap out of the way. A back zipper lets you access the main compartment when the bag is attached to your bike; the top flap grants access when you're carrying it over your shoulder. The Timbuk2 Colby Shoulder Bag includes an adjustable shoulder strap for versatile carry options.