Individually conforming impact attenuating liner for a helmet

A helmet comprising:

• a helmet shell;
• a liner comprising a liner body sized and coupled to an interior surface of the helmet shell and configured to fit around a portion of a wearer's head, the liner body comprising a plurality of cut-outs extending from a bottom peripheral edge of the liner body, the liner body comprised of an impact-absorbing material and having an outer surface with a convex curvature and an interior surface with a concave curvature;
• a plurality of pads removably attached to the interior surface of the liner body, each of the plurality of pads being repositionable at different locations on the interior surface of the liner body;
• and
• a retention system attached to the liner body and configured to secure the liner to the wearer's head during use, the retention system including at least one strap extending through a pair of apertures disposed in the liner body and having a portion, extending between the pair of apertures, sandwiched between the liner body and at least one of the plurality of pads, the pair of apertures being a pair of front apertures,
• wherein the liner body includes a pair of rear apertures and the at least one strap includes a front strap passed through the pair of front apertures and a rear strap passed through the pair of rear apertures,
• wherein the helmet shell extends over the plurality of cut-outs, and
• wherein a first front aperture of the pair of front apertures is non-parallel to a second front aperture of the pair of front apertures.