Possible Clues:

• Netlike hair controller
• Hair confiner
• Don's back around the round or around the hair at the back
• Hair-net
• Ornamental hairnet at back of head
• Loose cover of top soil containing nitrogen and oxygen
• Netlike hair wear
• Show dog's ear covering
• Cafeteria worker's headgear
• Lorna's turned up sporting no English headgear