Ortlieb Back Roller Plus - 40 liters of waterproof space! Light and reliable, thanks to polyurethane coated Cordura fabric. Anything you pack in these panniers is safe from rain and road spray. - Plus model: lighter, more supple material than in the Classic model, also lower total weight and PVC-free - Adjustable Quick Lock 2.1 system grabs your carrier and keeps the panniers reliably on - Large, high quality reflectors - Internal, flat mesh pocket - Roll closure: easy to use, sprayproof and light - Easy to couple to a separately available Ortlieb Rack Pack S or M - Five year guarantee* - Detachable shoulder straps Volume: 2 x 20 liters when rolled and closed according to manufacturer recommendations. By leaving a twist or two undone, you'll gain volume with the cost of sprayproofness. The Plus model sold here differs from the Classic model by its more supple and lighter Cordura material and lower overall weight. Weight and volume data refers to a pair of panniers.