The Protective Combat Uniform (PCU) is an interchangeable 15-piece, 7-level ensemble (the original block 0 configuration) that can be worn in layers appropriate for the mission.The PCU replaces the LEP.
The FREE system t-shirt and boxer briefs next-to-skin layer is constructed with a tri-blend of lenzing FR rayon fiber, wool, and nylon. This layer is extremely lightweight and breathable to allow high moisture movement and quick drying.