The term 'Do Cover' can refer to two different items used in the workplace. The first is a HAIRNET, which is a type of head covering made of fine mesh or netting that is worn to keep hair from falling into food or other products. The second is a HAT, which is a type of headgear that is worn for protection from the elements or to make a fashion statement. Both of these items are important for maintaining safety and hygiene standards in the workplace.