The advanced tactical vest was specially developed as part of our new concept of a Semi-Modular configuration for military use. The vest has a side opening with a slim design for better operation in urban and guerilla warfare’s. The S3 vest was designed based on the outer configuration of the S1 vest with the following improvements: Internal thermo-forming on both the front and back parts for better ventilation and comfort to the wearer. Attachment of our patented T-Belt for weight distribution and support to the lower back.