An impact-attenuating member, comprising: a first body member including a first base region, a first leg portion extending from the first base region, a second leg portion extending from the first base region, and a third leg portion extending from the first base region; a second body member including a second base region, a fourth leg portion extending from the second base region, a fifth leg portion extending from the second base region, and a sixth leg portion extending from the second base region; means for arranging the first and second body members such that the first base region is separated from the second base region and such that a free end of the first leg portion extends toward a free end of the fourth leg portion, a free end of the second leg portion extends toward a free end of the fifth leg portion, and a free end of the third leg portion extends toward a free end of the sixth leg portion, wherein the means for arranging arranges the first and second body members such that an impact force on at least one of the first or second base regions presses the free ends of the first and fourth leg portions together, presses the free ends of the second and fifth leg portions together, and presses the free ends of the third and sixth leg portions together, wherein the leg portions (206a, 206b, 206c) which extend from the first base region extend in different directions and are evenly spaced around the base region; and wherein the means for arranging includes a retaining member that extends between the first and second body members and at least partially holds the first and second body members in place with respect to one another, wherein the retaining member extends through an interior of the impact-attenuation member in a generally vertical direction, and wherein a biasing system is provided in or as part of the retaining member to pull the ends of the retaining member towards one another. a first body member including a first base region, a first leg portion extending from the first base region, a second leg portion extending from the first base region, and a third leg portion extending from the first base region; a second body member including a second base region, a fourth leg portion extending from the second base region, a fifth leg portion extending from the second base region, and a sixth leg portion extending from the second base region; means for arranging the first and second body members such that the first base region is separated from the second base region and such that a free end of the first leg portion extends toward a free end of the fourth leg portion, a free end of the second leg portion extends toward a free end of the fifth leg portion, and a free end of the third leg portion extends toward a free end of the sixth leg portion, wherein the means for arranging arranges the first and second body members such that an impact force on at least one of the first or second base regions presses the free ends of the first and fourth leg portions together, presses the free ends of the second and fifth leg portions together, and presses the free ends of the third and sixth leg portions together, wherein the leg portions (206a, 206b, 206c) which extend from the first base region extend in different directions and are evenly spaced around the base region; and