【Minimalist Design】The PACEARM bike seat bag adopts a simple design of a 3D casing and a two-way zipper for easy access to your items. There is also a hanger on the back to install a taillight to improve night vision. Product size: 20x11.5x10cm. 【Large Capacity】Our saddle bag is designed 10%-20% larger than those typical seat bags in the market, perfect for storing mini pump, repair kit, chain lube, mini flashlight and other biking accessories. 【Water-Resistant & Build to Last】Made of thick, tough and water-resistant PU & EVA material, the bicycle saddle bag offers better protection than those fabric bike bags. Also made with water-resistant zippers for better water repellency to withstand light rain and splashed water (Not waterproof. Do not expose the bag in the rain for long time). Besides, the oblique zipper design is good for water drainage and prevents water from penetrating into the bag and protects your valuables. 【Easy Installation】There are three Velcro straps for you to easily install the cycling bag to the bike and keep it secured without bounces. The straps are adjustable, suitable for most bicycles, such as general city cycles, mountain bike, cross bike, etc. 【Service & Support】Any pre-sale/after-sale questions about our bike seat bag, please feel free to contact our store. We have friendly and responsive customer service to reply your emails on Amazon within 12 hours. Look No Further!