ARMY FIREPROOF THERMAL COMBAT UNDERPANTS Forcetek Army Fleece Top PCS Thermal Undershirt British Light Green All Sizes British Army Fleece Thermal Undershirt PCS outdoors.ee Pentagon Pindos 2.0 K11003 01 Black. The Pentagon Pindos Thermal Under Shirt is a premium quality base layer designed to provide warmth, comfort, and dryness during cold weather activities. Made from technical quick drying fabric, it efficiently wicks moisture away from the body and helps regulate body temperature. The breathable construction ensures optimal airflow, while the antibacterial treatment prevents the development of unpleasant odors. Its regular fit and stretchable fabric allow unrestricted movement, making the Pindos shirt an excellent first layer for hiking, training, hunting, or active everyday use.