The BBB EasyPack tech seatpost uses the best materials and the latest technology. A blue lining provides better visibility of the content. Elastic strap and pocket for easy organization of the contents of your handbag. The waterproof zipper with a clip provides additional safety and is absolutely silent when driving. Mount for rear clearance-LED flashlight. The black reflective strip provides the best visibility of you on the road. Double Velcro closure helps to quickly and easily install / remove the bag. Rubber strap for attaching to the seatpost to securely hold the handbag and to prevent damage to the lycra shorts and seatpost.