An ancient Milanese folk remedy says that, to relieve the itching, it is necessary to create a cross on the mosquito bite with the nail. Crüss” (”cross” in Milanese dialect) is a metal ring that comes from the desire to concretize this affectionate gesture that our grandmothers made. On summer evenings a light pressure with the ring on the mosquito bite will be enough to obtain, with a discreet gesture, an immediate relief from the itching.