The 4-point connection is more stable --- No extra screws are needed, there are 4 fastener straps around the bicycle handlebar bag, and there is no drilling required for a typical water bottle holder. The fastener strap can be adjusted to fit your bicycle handlebars. 2 fastener strap loops will connect the stand pouch to your handlebar, and the other 2 loops will connect to the stem. When riding a bike, it will be firmly fixed in front. Insulation Aluminum Foil Stem Bag---Our stalk bag uses a special aluminum foil inner layer, which can keep your cold drinks for a long time in the hot summer and keep you warm in the cold winter. There is a sturdy shell at the bottom, made of durable Oxford PU. Versatile and easy to carry --- suitable for professional and amateur riders. More importantly, there is a detachable shoulder strap. After riding the bicycle, it can be a shoulder bag, which can protect your pocket and is convenient to carry anywhere. Quick to open and easy to access --- This bicycle bag is suitable for bottles with a diameter of less than 8.99 cm/3.54 inches/capacity of 750 ml and a height of 16 cm/6.30 inches. The top strap seal can be quickly opened/closed, allowing you to quickly access your water bottle, snacks, etc. In addition, the side pocket of the bag is 12 cm/4.7 inches (length) * 8.5 cm/3.35 inches (width), which is very suitable for holding energy bars, trash, mobile phones, gadgets, etc. Durable fabric and easy to clean --- This bicycle handlebar insulated handlebar pouch is made of durable polyester material. Waterproof and weatherproof, keep your equipment free from dirt, dirt and dust. And keep your items dry and safe. The surface can be easily cleaned by simply wiping with your hands. Specification: Color: BlackMaterial: PolyesterCapacity: 0.75LSize: 16 * 9 cm