Tanker Boston BagPORTER 's signature series, Tanker, has been reborn using 100% plant based nylon, the world's first material to be successfully mass produced. With the concept of "ALL NEW TANKER Nothing changes, everything changes," we have undergone revolutionary changes. The Boston bag is a distinctive item with its half moon design. It is large enough to carry everyday items such as a smartphone and wallet, and has a large storage capacity yet is compact in size.