In 2015, it was customary for one to wear multiple ties, with business suits. To an observer from an earlier era (such as Jennifer Parker, for example), it would appear at first glance that the wearer had put on two identical neckties, each with its own knot. On closer inspection, however, one would note that the two ties were separated by an addition, fastened by a button, to the middle of the shirt collar. The multiple ties were different from the transparent necktie, something which Emmett Brown was wearing when he picked up Marty and Jennifer in 1985.