Abstract: Featured is an athletic undergarment that provides compressive support in the legs and lower torso of a person and which is composed of a breathable material appropriate for athletic use so as to facilitate wicking of moisture away from the body and also facilitating heat transfer from the body. In particular embodiments, the athletic undergarment includes a first garment portion that joins with itself to form a first leg support portion, a second garment portion that joins with itself to form a second leg support portion, a third portion that joins the first and second portions to form a gusset, and the first and second portions join with each other to form a torso support portion. Also featured is a riding garment including riding breeches in which is securedly disposed the undergarment of the present invention.