These are assaulters armbands from Eagle Industries. The armbands are a great way to easily access and view important info while on the go or during missions. Inside are clear compartments to hold maps or quick reference cards. There is a large compartment and a small compartment. The armband is secured closed by a hook and loop strap. On the outside of the armband is a elastic slot to hold a pen or marker. Wearing the armband is easy with two adjustable straps.