An orthotic substantially precludes a human wearing it from rolling from her or his side to her or his face or back. The garment (such as a vest or jacket) has an open top portion, a front that can be closed by fasteners, a substantially closed rear, a first receptacle on the front, and a second receptacle on the rear and functionally cooperating with the first receptacle. Third and fourth receptacles are preferably also provided, the first and second receptacles on the left side of the garment, and the third and fourth on the right side. The garment may be primarily of a stretchable mesh fabric. A cylindrical or prismatic bolster (e. g. of firm foam or rubber) is insertable into, and removable from, each of the first and second receptacles, or each of the third and fourth receptacles.