Superior Material & Water-resistant — Bicycle frame bag is made of 600D Oxford fabric with a smooth PU coating, offering waterproof, durable, and anti-scratch performance. Upgraded seam-sealed zipper withstands repeated use and helps prevent rainwater intrusion to keep belongings dry and safe. Strap-on & Adjustable Position Install — Features loops around the bag frame and three independent hook-and-loop fastener straps for secure installation under the seat or near the handlebar, avoiding interference with water bottle mounts. Compatible with most mountain, road, and commuter bikes. Large Reflective Area for Night — Includes large reflective panels on both sides for enhanced visibility from multiple angles, improving safety during low-light riding. Well Organized Pockets — Measures 8.9 x 6.1 x 2.2 inches (L x W x H) with 1.5L capacity. Left zipper pocket holds cards and cash; right main compartment accommodates phone, power bank, gloves, sunglasses, flashlight, mini bike pump, repair tools, and other accessories. Two interior layered pockets and a key hook aid organization. Dual Zipper Opening — Right-side main compartment features a wide opening with dual zippers for easy access. Non-slip zipper puller allows operation even with thick gloves.