Fixing for more stability: No extra screws required, fastening straps around the bike handlebar pocket, no drilling required for typical water bottle cages. The fastening straps can be adjusted to fit your bike handlebars. It will be securely fastened to the front during the ride. Insulated foil stem bag: With a special foil inner layer, this our stem bag will keep your cold drinks for a long time in the hot summer and stay warm in the cold winter. The bottom has a sturdy shell and is made of durable oxford material. Our handlebar water bottle bag is the perfect product for long outdoor bike rides. Easy to carry and functional: The bike water bottle cage bag is suitable for both professional and amateur riders. What's more, it has a detachable shoulder strap. Once you're done with your ride, it can become a duffel bag which will keep your pockets safe and easy to carry anywhere. [Quick Open, Easy Access]: The top drawstring closure can be opened/closed quickly, giving you quick access to your water bottle, snacks and more. In addition, the side pockets of the bag are suitable for holding energy bars, trash, mobile phones such as Apple 4, 5, 6, 6S, gadgets, etc. [Durable fabric and easy to clean]: This bike handlebar thermal bar bag is made of strong and durable polyester material. Waterproof and weather resistant, it keeps your gear free from dirt, mud and dust. and keeps your belongings dry and safe. It is very easy to clean the surface, just wipe it with your hands.