The Army began fielding the Improved Outer Tactical Vest (IOTV) in the fourth quarter of 2007. The IOTV is a side-opening vest that provides a greater area of coverage than the Outer Tactical Vest (OTV) and weighs three pounds less.

The IOTV deltoid protector has the same basic design as the deltoid protector for the deltoid axillary protection system attached to the outer tactical vest.

The first delivery of the new Gen II Improved Outer Tactical Vest (IOTV) in Operation Enduring Freedom Camouflage Pattern (OCP) began on 16 July 2010.

Incremental enhancements to the Improved Outer Tactical Vest (IOTV) transitioned to production in FY12. Design enhancements included a more robust quick-release technology for improved functionality. Additionally the IOTV Gen III included other design features to improve comfort, mobility and functionality, especially to female and small statured Soldiers.

The IOTV groin protector has the same basic design as the OTV groin protector.

The IOTV lower back protector provides additional protection for the lower spine and pelvis. The lower back protector attaches to the inside of the back carrier using two nylon straps and snap fasteners.

The IOTV yoke and collar assembly provides additional ballistic protection to the neck and shoulders.

The IOTV Gen II deltoid protector has the same basic design as the Gen I deltoid protector.

The IOTV Gen II groin protector has the same basic design as the Gen I groin protector.

The IOTV Gen II lower back protector is a simplified version of the Gen I lower back protector. It has neither PALS webbing nor a utility channel, and the interior fabric is woven nylon similar to the exterior fabric.

The IOTV Gen II yoke and collar assembly was initially the same as the Gen I yoke and collar assembly except that ballistic inserts are not removable.

The IOTV Gen III deltoid protector has the same basic design as the Gen II deltoid protector.

The IOTV Gen III groin protector is worn on the ACU trouser, and provides additional protection to the femoral arteries and pelvis. It is a new design for the IOTV Gen III and is attached to the front carrier for storage only. The attachment straps are tucked into the groin protector carrier when not attached to the front carrier.

The IOTV Gen III lower back protector has the same basic design as the Gen II lower back protector.

The IOTV Gen III yoke/collar assembly has the same basic design as the redesigned Gen II yoke/collar assembly.

The Enhanced Side Ballistic Insert (ESBI) plates provide additional coverage as they protect the wearer's sides between the Enhanced Small Arms Protective Insert (ESAPI) plates worn inside the front and rear, and provide the same ballistic protection as the ESAPI.

Purchase description FQ/PD 07-05 provides for a multiple threat/Interceptor body armor system (IBA) consisting of a base vest and modular components (IOTV) for tailoring protection levels to defeatmultiple ballistic hazards across the battlefield continuum and manage armor weight.