WATERPROOF - Sahoo Bicycle Top Tube Bag is made of 600D Wax Coated Fabric with Waterproof Zipper. This top tube is super durable, waterproof and easy to wipe down from mud and sewage. Simple Style Design - New design, better materials, reflective logo, perfect size for the best bike top tube frame pannier bag for commuting and riding. SECURE SECURITY - Reflective logo enhances your visibility in low light or dark conditions, secures securely with 3 premium Velcro straps for quick installation and release, fits most bike racks. IDEAL SIZE - 13.4*9*6.7 inches (check the picture for detailed dimensions), 1 liter (0.27 gallon) capacity. Ideal storage for everyday essentials, bike tools, bike accessories and multi-day supplies. MORE THAN A BIKE BAG - Not only can it be used as a bike top tube bag, but also as a stylish commuter bag or tote bag. Thanksgiving, Christmas or Birthday gifts for loved s, family or friends