Why you need this tube bag An antislip soft base keeps the bag in place during riding, reducing movement and improving security for your belongings. The design helps reduce wind resistance, supporting smoother cycling performance. Fully waterproof construction protects contents in wet weather. Durable construction and versatile mounting Built with a durable shell and folded plate to enhance impact resistance. Two installation options provide versatile compatibility across a wide range of bike frames. Lightweight, weatherproof material Made from PVC for a combination of light weight and durability. Weatherproof functionality maintains storage stability in varying riding conditions. Practical benefits Keeps belongings dry and secure whether you are navigating city streets or mountain paths. Lightweight and sturdy design supports daily use without adding significant bulk. Use scenarios City commute in rain: secure, dry storage that stays in place through stops and starts. Mountain or mixedterrain rides: robust protection against bumps while remaining securely mounted. Frequent errand riding: quick access and reliable weatherproof storage across different bike frames. Key attributes at a glance Function: tube bag with antislip base, waterproofing, and protective shell. Compatibility: two mounting options for versatile fit across bike frames. Material: PVC for lightweight durability and weatherproof performance. Performance: reduced wind resistance, secure mounting, and protected storage in wet conditions.