Perfect as a grab and go EDC pack or as an emergency bug out bag, the Assault Pack by Red Rock Outdoor Gear is literally the best deal on the internet right now. I personally own the medium-sized version of this bag (pictured below) and throw it on the fire truck with the rest of my gear every shift.
The Larger version seen above offers 35 liters of zippered storage space along with a padded mesh external pocket compatible with 2.5 liter hydration bladders, MOLLE webbing throughout, adjustable padded shoulder straps, and compression straps. These bags hold up very well, especially for their price compared to the 1000D Cordura bags offered by 5.11 and GoRuck. Available in a variety of colors now at Amazon – $46. The medium Assault Pack can be found here. – $37+