Waterproof design Built to withstand harsh conditions, this frame bag for bike features a rugged waterproof exterior that keeps your gear dry and secure during daily commutes, mountain trails, and long rides in unexpected weather. Triangle fit for stable mounting The aerodynamic triangular shape fits snugly within most bike frames, providing balanced weight distribution and reduced drag. It mounts securely with multiple straps for a firm hold on varied frame geometries. Convenient side zipper access A smooth-glide side zipper allows easy access to tools, snacks, or personal items on the go, so you can grab what you need quickly without stopping or unpacking completely. Spacious yet compact storage Despite its compact profile, the bag offers ample space for essential gear such as tire levers, patch kits, multi-tools, energy bars, or phones, making it a smart addition for casual rides and professional cycling. Use scenarios - Daily urban commute: keep repair tools and spare parts accessible in wet weather while maintaining a clean cockpit. - Mountain trail rides: store tire levers, patch kit, and a small multi-tool for on-trail adjustments without removing the bag. - Long rides or training sessions: accommodate energy bars and a phone for easy access during breaks or quick checks.