Jandd's Mountain 4 Handlebar Pack has 3M Scotchlite Reflective Material, an HDPE frame sheet,a foldaway map compartment and main, front and flat pockets. The Mountain 4 also has the Jandd QRB mount system and D-rings for an optional shoulder strap. The hideaway map flap is perfect for cyclists on the go who occasionally need to reference their location, but do not always need a map window fixed to the top of the pack. The map flap tucks behind the floating front pocket when not in use. The map is protected by marine-grade vinyl, guaranteed not to yellow for ten years.