Abstract: A protective cover fits over the top of a hockey skate boot. The cover has a vertically-split heel that is contiguous with an open bottom, and includes enough flexibility and tension that the cover can be flexed open diagonally from the split heel to fit over the top of the hockey skate boot, and then released to substantially conform to the instep, sides, ankles, and a portion of the heel in a tensioned fit. The preferred material for the cover is a high grade polycarbonate. The high grade polycarbonate is advantageous over other materials known in the art of covers based on the specific strength, impact resistance and elongation characteristics of high grade polycarbonates. The temperature ranges that the cover may be used in vary significantly and the high grade polycarbonate provides for optimal protection and performance in the wide temperature ranges.