Operation Interflex is a UK-led program launched in 2022 to train Ukrainian soldiers in essential military skills to defend against Russian aggression. The training includes weapon handling, fieldcraft, first aid, and patrol tactics, supported by personnel from allied nations. The UK also provides soldiers with essential equipment such as uniforms, body armor, helmets, and medical kits. This initiative enhances Ukraine's defensive capabilities and strengthens its forces on the frontline.

These shirts are cut similarly to British MTP PCS Field Shirts. Two chest pockets, two arm pockets. Zip-up and button-up chest. Button-adjustable cuffs.