The Original ShuBee Shoe Covers prevents tracking dirt, mud and other materials from entering inside homes and comes in a dark blue color. These are the perfect solution for construction, heating and air, pest control, plumbing and other service industries to keep customers’ floors and carpets from getting dirty! These covers are made out of a cloth like material, are thick and strong and breathable. They are able to be slipped over shoes as large as size 18 work boots.