The Ortlieb Back Roller Free Pannier bags belong to the new PVC-free line of products made of a polyurethane-coated polyester fabric. High quality, resistant, visible and waterproof. And with a capacity of 20 liters each.In them you can save what you need for your bike tours and weekly grocery-shopping ventures. They also come with bright reflectors made of 3M Scotchlite reflective material, on both sides of the bags, to make you more visible. If one day you don\'t need to carry both saddlebags, you can easily remove one, and take only one on the bike without a problem. Also includes a shoulder strap to take your pannier bag wherever you want. With the Quick-Lock2.1 system, the bags attach to any bike rack with a tube diameter of up to 16 mm