The jeep cap can generally be described as beanie with a brim attached to it and is mostly made from knitted yarn. In 1942 during World War II the United States Army had first issued the cap for it to be worn under heavy combat helmets for extra padding and warmth. The cap was only accessible to enlisted men and became popular with soldiers who wore them just to wear them. The MASH character Radar OReilly of the show M*A*S*H had popularized the jeep cap, where he was hardly seen without it. Today the jeep cap can be seen worn as a comfortable casual cap for warmth during cold weather and in style fashion. You will find both official military jeep caps and exact replicas. Military jeep are generally one size fits most and are regarded as unisex caps. Jeep Caps are also known as skull wool beanies, solid knit campus visors, wool skiing styles hats, G.I. Genuine plain attire, etc. Jeep Caps are commonly misspelled as gi ensemble, etc.