Durable 3 Layers Shell: Outer layer made of Oxford fabric, thick EPE in the middle, and inner layer crafted from polyester fabric It is sturdy and deformation-resistant. Not only does it boast an appealing appearance, but it also provides excellent protection for the items stored inside. Large L-Shaped Opening: Designed with an L-shaped large opening and 2 smooth zippers, making it easier for you to access and store your belongings. With dimensions of 17x21x26cm, this bike bag effortlessly accommodates your essentials. Measuring as thin as 6cm, your legs won't brush against the bag, providing a comfortable cycling experience. Surpassing Expectations in Storage Capacity: This bike bag offers an additional mesh pocket at the bottom for storing bike lubricants or an air pump. Inside the bag, there is a mesh compartment to keep your valuable items, such as your phone, separated from other belongings. Moreover, the bag features an elastic strap to secure items in place, preventing any jostling during your ride. Water-Resistant: Equipped with a water-resistant zipper and three-layer shell, no need to worry about light rain (please avoid prolonged exposure to heavy rain). Protect Your Bike's Paint: This bike bag securely fastens to your bicycle with three straps, each featuring a soft padding to prevent any abrasion to your bike's paint.