Ideal for anyone carrying a medium-sized underseat load on or off the road. A three-point suspension system with an extra long, trimmable seat post strap will fit larger aero seatposts as well. A 3/4†main webbing strap that threads over each seatrail has a side squeeze buckle that allows for easy removal. The main straps can also be used to compress the load, eliminating the bouncing bag syndrome. The bag is double layered and has an HDPE plastic stiffener to add shape and durability. Top-quality, double-head zipper allows easy access at the rear of the bag. A quick access key pocket on the underside provides additional stash room and a strip of 3M ScotchliteTM Reflective Material provides an attachment point for a clip-on rear blinking light for additional safety. Light/blinkie not included.