A strap adjustor for a helmet, comprising: a top surface; a bottom surface opposite the top surface in a thickness direction (z) of the strap adjustor; an upper surface that extends between the top surface and the bottom surface; a lower surface opposite the upper surface in a length direction (y) of the strap adjustor; a front surface; a back surface opposite the front surface in a width direction (x) of the strap adjustor, the top surface being bordered by the upper surface, the lower surface, the front surface, and the back surface; a first through opening that extends from the top surface towards the bottom surface; a first end opening that extends from the upper surface to the first through opening; characterized in that: the strap adjustor comprises a second through opening that extends through the strap adjustor from the top surface toward the bottom surface; the strap adjustor comprises a bar separating the first through opening and the second through opening, the bar extending between the front surface and the back surface; and the strap adjustor comprises a second end opening offset and separate from the first end opening in the width direction (x), the second end opening extending from the upper surface to the first through opening, the first end opening and the second end opening being aligned with angles of the front surface and the back surface the strap adjustor is configured to receive a first strap and a second strap at different relative angles with the first strap being disposed through the first end opening, through the first through opening, and over the bar, and the second strap being disposed through the second end opening, through the first through opening and over the bar. a top surface; a bottom surface opposite the top surface in a thickness direction (z) of the strap adjustor; an upper surface that extends between the top surface and the bottom surface; a lower surface opposite the upper surface in a length direction (y) of the strap adjustor; a front surface; a back surface opposite the front surface in a width direction (x) of the strap adjustor, the top surface being bordered by the upper surface, the lower surface, the front surface, and the back surface; a first through opening that extends from the top surface towards the bottom surface; a first end opening that extends from the upper surface to the first through opening; the strap adjustor comprises a second through opening that extends through the strap adjustor from the top surface toward the bottom surface; the strap adjustor comprises a bar separating the first through opening and the second through opening, the bar extending between the front surface and the back surface; and the strap adjustor comprises a second end opening offset and separate from the first end opening in the width direction (x), the second end opening extending from the upper surface to the first through opening, the first end opening and the second end opening being aligned with angles of the front surface and the back surface the strap adjustor is configured to receive a first strap and a second strap at different relative angles with the first strap being disposed through the first end opening, through the first through opening, and over the bar, and the second strap being disposed through the second end opening, through the first through opening and over the bar.