A boot leg opening cover attachment for attachment to a pair of boots to cover the upper leg openings of the boots to prevent precipitation and debris from entering the boots. The boot leg opening cover attachment includes a pair of cover members each having upper and lower faces and a lower perimeter edge. Each of the cover members is designed for position over a boot leg opening of an associated boot to cover the respective boot leg opening. A clip connects the lower perimeter side edges of the cover members together. The clip is designed for attachment to adjacent portions of the boots to attach the cover members to the boots.