Superior Material & Water-resistant — Bicycle frame bag is made of 600D Oxford fabric with a smooth PU coating, offering waterproof, durable, and scratch-resistant performance. Upgraded seam-sealed zipper withstands repeated use and helps prevent rainwater intrusion to keep belongings dry and secure. Strap-on & Adjustable Position Installation — Features loops around the bag and three independent hook-and-loop straps for secure, customizable mounting under the seat or near the handlebar—without interfering with water bottle cages. Compatible with most mountain, road, and commuter bikes. Large Reflective Area for Night Visibility — Includes large reflective panels on both sides for enhanced visibility from multiple angles during low-light conditions, improving safety for night riding or dark commutes. 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 essentials such as smartphone, power bank, gloves, sunglasses, flashlight, mini bike pump, repair tools, and accessories. Two interior layered pockets and a key hook aid organization. Dual Zipper Opening — Main compartment features a wide opening with dual zippers for easy access. Non-slip zipper puller allows operation even with thick gloves.