Features1Waterproof Material: The bike rear seat bag is made of waterproof and durable polyester material, which can effectively prevent rain, water, mud and dust from entering the bag quickly. 2Main Compartment: 1 main compartment has 12L capacity to store your clothes, books or other daily essentials. Both side bags have ample space for your belongings. 3Small Pockets: 6 multifunctional small pockets can store carry on items while riding, such as cell phone, cell phone charger, wallet, cable, earphone, power bank, map, etc. 4Hook and Loop Fastening Straps: 4 durable hook and loop fastening straps are sufficient to secure the bike bag to the rear seat. Make sure it doesn't move around, even if you're riding on rough roads. 5Flexible Shoulder Straps: The flexible shoulder straps are available in lengths from 36.2 to 60 inches (91.4 to 151.4 cm) and can be adjusted loose or tight to fit your body ly. 6Top Handle Design: The top handle design of the bike rear seat bag is convenient and comfortable to carry. You can change the way of carrying according to your needs.SpecificationItem Type: Bike Back Seat BagMaterial: PolyesterColor: BlackWeight: Approx. 349g / 12.3ozProduct Size: Approx. 38.4x16.2x16.2cm / 15.1x6.4x6.4inPackage List1 x Bike Back Seat Bag