The Throwover side bags are made of cotton canvas with UV Wax Waxed waterproofing treatment. In addition to the main material, a sturdy CORDURA©, these wonderful bags are embellished with leather panels that will age and show character over time. The roll top closure and Velcro Road Shield will keep the wind and weather away from the contents. The "moto centric" quick buckles and Burly embossed metal snap fasteners and "Anti-Flail Snap System" flaps keep everything safe. The saddle bags also have a central section that can be adjusted in width. The yoke can be widened or reduced to fit the fender and fixed to the bike with laces. The side bags allow you to remove your luggage from your bike in less than 5 minutes. We recommend using the universal support brackets.