Ideal for anyone carrying a small to 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 seat posts as well. A 3/4†main webbing strap threads over each seat rail and fastens with sturdy hook and loop. Double layered, this bag has a full length HDPE stiffener adds shape and durability. Top-quality, double-head zipper allows easy access at the rear of the bag. A strip of 3M ScotchliteTM Reflective Material provides an attachment point for a clip-on rear blinking light for additional safety.