A flight suit is a full boy garment, worn while flying a powered aircraft such as military airplanes and helicopters. These suits are generally made to keep the wearer warm, as well as being practical, and durable (including fire retardant). Its appearance is usually similar to a jumpsuit. A military flight suit may also show rank insignia. It is sometimes used as a combat uniform in CQB or VBSS situations, for its practicality.