DONGMEN Borussia Dortmund Logo Drawstring Bags/Backpack/Rucksack/Shoulder Bags/Gym Bag Twin Sides (Medium) Material:Polyester Fabric. Size:Approx 13.8"(W) X 18.1"(H) Lightweight and convenient and easy carry. One adjustable padded backpack strap. Can be customized according to your image.