A strap adjustor can comprise a first surface, a second surface opposite the first surface, a third surface that extends between the first surface and the second surface. A first opening in the first surface can extend completely through the strap adjustor between the first surface and the second surface. A second opening in the first surface can extend partially but not completely through the strap adjustor. A bar can be disposed at the first surface between the first opening and the second opening. A third opening in the third surface can extends partially but not completely through the strap adjustor and join with the second opening. At least one strap can be disposed partially through the third opening, and the at least one strap can comprise an uncompressed thickness that is greater than a height of the third opening.