Water-Resistance & Premium Quality- The bike rack bag is made of water-resistant 900D fabric and equipped with a waterproof zipper, resists leakage of water and sudden rain, keep your belongs dry in any weather. Delicate workmanship, durable and solid, providing a long time serve.Insulated & Large Capacity- Eyein bicycle pannier bag comes with thick PEVA material, provides excellent thermal insulation and cold preservation effect, keeps your food or beverage cold or warm for hours. 10L large capacity features on the main compartment serve you an abundant room to store items.Versatile & Multifunctional- Not only can be used as a rake bag on a bike but also use as a shoulder bag with an adjustable shoulder strap, and a handbag with a comfortable handle loop. The side pocket keeps your water bottle or other items like repair tools in place. The multifunctional bag will be the best companion during cycling and commuter.Reflective for Safety Riding- Designed with reflective straps around zippers, plus the reflective logo on each side, the bike rack bag help to provide good visibility in a low-light environment. The taillight hanger enables to attach a rear light, helping to ride safer in the dark or at night.Tool-Free Installation- This rack rear bag comes with front and bottom hook and loop fastener straps, makes it easy to be installed and removed, and be fastened securely to the rack, suitable for most bikes, like mountain bikes, road bikes, e-bikes, and other commuter bikes. Tips: This bike cooler bag is suitable for bicycle racks with a width of fewer than 7 inches.