The Jackhammer is distinguished by its ideal size as a base for a military pack. A great stand-alone pack, with ample 3-day-class storage and two pockets sized for 2 liter hydration bladders (not included). And using Eberlestock's innovative Intex-II frame, it has the benefits of body contour fitting ergonomic, closer-to-body load carriage, and a bottom cargo shelf. Overall dimensions of 21 inches by 13 inches by 8 inches. Constructed of 502-Denier nylon exterior with 1000-Denier wear points.