Genuine British Army issue shirts designed to be worn under body armor and constructed from Coolmax fabric for all day comfort. Sleeves have large Velcro closure upper pockets with removable Velcro patches for adding unit insignia. Forearms have two smaller Velcro pockets on each sleeve with wrist button adjustments. Zipper neck for easy on/off. Highly breathable and wicking, microbiological front and back center panels.