Product details:

The Ortlieb Rack-Pack comes in multiple sizes for your adventuring level. The 100 waterproof construction and convenient holds that fit on a bike rack or on the back of a motorcycle make traveling with your essentials a never-before-seen breeze. Bike with pride knowing your gear is protected and ready for anything.Roll closure with stiffener bar
Compression straps
Buckles for combining with bike panniers
Weight: 760g