One of the elements of equipment for the soldier to carry out the tasks assigned training and the battlefield is a backpack - an integral part of the equipment, which are designed to carry out materials, equipment and provision of the training process and battle operations. Soldier's modular backpack system manual is a continuation of 1.edition, "The Soldier's Individual Protection System". 2nd edition provides Soldiers of the information on the introduction of the modular backpack system, its quality features, basic elements, uses and maintenance procedures. The authors thank all the soldiers who participated in the research process backpacks system design, field evaluation procedures, and provided support with military operations knowledge and experience.