Keep your essentials secure and dry with this 1.2L waterproof bicycle seat bag, crafted from durable 600D polyester TPU for 100% weather resistance. Ideal for mountain and road cycling, it features a roll-up design with seamless voltage tech to withstand heavy rain. The smooth 3D shape, supported by a 1mm PE board, ensures a perfect fit and protects your gear. Quick installation requires no tools, and it includes reflective straps and a taillight lanyard for safety. Spacious enough to hold a 7.5 -inch phone, glasses, gloves, tools, and more, making it a must-have cycling accessory for all your adventures.