["WATERPROOF AND DURABLE:The bag is made of a material called \"Twill Fabric\" which is made of three kinds of materials through high temperature heat.The surface and inside both coated with a special waterproof thicker coating. The middle is the well-knit Nylon mesh. Even in the harsh outdoor conditions, this bag can be waterproof and wear-resistant.\n\nSTABLE AND ANTI-ATTRITION: We are using two adjust rail systems to keep the bag in place. The straps are long enough to snug it down tight against the front tube and top tube. They are made of non-slip soft leather to reduce friction on the bike tube\n\nEASY TO OPEN DESIGN: This package is designed with double zipper. Two zippers are connected by a high quality nylon cable. This make it easier for you to get your goods.\n\nPERFECT FIT: The bag has a shape body. It's only 2.36 inches wide and perfect fit your bike frame. Your legs won'for t for touch it at all while ppedalling.\n\nOPTIMAL STORAGE ROOM FOR SMALL ITEMS: The main compartment is 20*6*10cm. It fits small essential items like a cell phone or a wallet.\n\nRhinowalk MTB Bicycle Front Frame Bags Waterproof Cycling Tube Bag Large Capacity Road Bike Pannier Phone for Case Black RK18330\n\nItem Name:Rhinowalk Bicycle Cycling Tube Bag\n\nTube Bag Color:Black\n\nBicycle Bag Size:20*6*10cm\n\nBag Capacity:1.2L(6.5 Inch Cell Phone,Sunglasses,Gloves,Repair Tools,for Key.)\n\nN.for W.:118g Ultralight\n\nOpen :Full Waterproof Zipper\n\nFeature:Bicycle Front Tube Bag,Hand bag, Multifunction,Fixing Straps Removeable Become A Storage Bag \n\nPackage Included\n\nMain Bag *1 \n\nInner Panel*1\n\nFixing Strap *3\n\nNotice:\n\nActual color may be slightly different from the for image due to different monitor and light effect.\nPlease allow 1-3cm deviation due to manual measurement."]