The toe guards fit any shoe, provide maximum toe protection, and cause no discomfort because they don\'t encase the toe. They are light enough to be worn comfortably all day. Abnormal foot conditions do not cause problems. Weighing just 12 ounces, each guard is designed to withstand an impact of 75 foot-pounds with a large safety factor designed in. Width is 4 1/2in men, 4in women. To keep the guard properly positioned, it has a rubber toe clip, crossbar, and either a one-piece rubber strap with a tension buckle, or a two-piece leather strap with a spring fastening device. Foot guards are available in aluminum alloy or steel, with equal protection from either material. Per Federal Regulations, guards provide protection equal to AIMSI-Z41 standards.