ROCKBROS Bike Bag Waterproof Reflective 10L Large Capacity Saddle Bag Cycling Foldable Tail Rear Bag MTB Road Trunk Bicycle Bag

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• good bag, also works on my smaller frame sizes and does not rub on the back wheel (172cm height)
• water proof, only disadvantage is, there is no valve or so, so you have to press out all the air in order to reduce the bag size.