Abstract: A unitary sleeved partial undershirt may be configured to be worn as an outer garment or beneath an outer garment. The partial undershirt may include tubular first and second sleeves of at least 12 inches in length, each having tubular construction that is void of any fastener. The first and second sleeves may be sized to conform to contours of arms of the wearer. The partial undershirt may additionally include a yoke including a front yoke portion, a back yoke portion, an undershirt neck edge defining an undershirt neck opening, and an undershirt torso opening edge defining an undershirt torso opening. The yoke may extend continuously and non-separably between the sleeves, and the front and/or back yoke portions may be sized such that the distance between the undershirt neck edge and the undershirt torso opening edge at the front yoke portion and back yoke portion is in a range between 1.35 and 8.8 inches.