Tanker Boston Bag (L) NavyPORTER 's signature series, Tanker, has been reborn using 100% plant based nylon, the world's first material to be successfully mass produced. The Boston bag (L) is a distinctive item with its half moon design. It has enough capacity for everyday use when you have a lot of luggage, as well as for short trips of about one night. The side pockets and hook and eye pockets on the exterior are convenient for storing and retrieving small items such as