When you carry it, the bottom of the bag that can be stained by dirt splashing out of the bag, so it wont stain your clothes. The strap will be longer when compressed the bag, so the tape clips are attached and tucked together. The bottom of the bag is equipped with a resin plate as a tire protector. Reflective tape on top and bottom of bag Material: Nylon (waterproof PVC backing); Size: Width 8.3 x Height 5.5 x Length 14.6 - 21.7 inches (21 x 14 x 37 - 55 cm); Weight: 17.6 oz (500 g); Country of Manufacture: Japan Set Includes: Main unit x 1, tire protector x 1 (installed on the bottom), product color and size may differ from the actual product depending on your display type. Product specifications, logo design, etc. may be subject to change for product improvement. We also cannot answer measurements or personal fit that the manufacturer does not announce. Please be aware of