An article of clothing includes a front portion, a rear portion oppositely positioned from the front portion, a waistband encircling a top of each of the front portion and the rear portion, a right leg panel and a left leg panel extending downward from the waistband in the rear portion, a rear right band extending downward from the waistband and flanking a lateral edge of the right leg panel, a rear left band extending downward from the waistband and flanking a lateral edge of the left leg panel, a material void region in the rear portion forming a gap between the rear right band and the rear left band, and a sacrum guide that runs horizontally between the rear right band and the rear left band.