macpac Macpac Amp Multi This is a technical pack developed for multi-sport races. It supports short adventure races that require speed, such as mountain biking, trail running, and rogaining. It has a simple single-compartment structure and uses a zippered panel loading system for quick loading and unloading of gear. It has two compartments, making it easy to sort your belongings. The shoulder harness has stretch pockets for storing energy food and soft flasks, and two adjustable chest straps are placed to enhance the fit to the body. The stretch pockets located from the front to the sides are designed to be accessible while wearing the pack.