Hard Shell Bag: Bike rack bag is made of EVA with PU coated surface. it can withstand heavy loads and protect the contents of the bag. , anti-collision, easy to clean and durable. Black line design, sharp and generous, full of fashion..10 Liter Capacity:Our bike trunk bag measures 15 .16x 7.68 x 6.3 inches (L x W x H). With about ten liters of internal capacity, it contains elastic straps at the top to hold items and small pockets on the side. This helps to put your ride enough to store bike tool kit, pump, wallet, cell phone, mobile power, food, drink, bike lock, sunglasses and so on.. Detailed Design: 4 sides reflective design to increase visibility at night, also can be installed tail light (not included) on the back strap to protect your riding !. : 1 buckle mounting strap and 2 velcro straps to ensure maximum stability and . Allows you to simply mount it on most bike racks, such as mountain bikes, road bikes, e-bikes and more.. Multifunctional: The bike bag comes with adjustable shoulder strap and handle, easy to carry, can be handheld or shoulder. It will be your good partner no matter any occasion such as picnic, camping, commuting, hiking or traveling.