Features: Made from waterproof polyester material, which is durable and long-lasting. Internal aluminum foils insulation designs, helps keep drinks and food warm or cold. Large capacity, enables you to store small tire repair tools, taillight, glove, tissues, phones, water bottle, beverages, and other essential items you need during cycling. Designed with reflective straps on the side, makes it visible at night, which is safe for your cycling. With a taillight hook on the back of the bike Carriers bag for hangings taillight. Bike rear seat bag have adjustable adhesive mounting straps for quick installation and removal. No tools needed. Side adjustable water bottle holder for easily take the water bottle out. Suitable for bike, electric Bicycles and other commuters bikes, especially perfect for your Bicycles riding. Specifications: Material: Polyester Color: Black/Gray Size: Approx. 38x15.5x16cm/14.96x6.10x6.30inch Package Includes: 1Pc Bike Rear Seat Bag note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.