Porter Yoshida & Co. Heat Shoulder BagThe Heat series combines two different materials with excellent durability and water resistance. The main material is nylon made in Japan woven with 66 nylon threads, which is also used for car airbags and bulletproof vests, and has excellent heat resistance, abrasion resistance, and tear strength. The bottom and side parts are made of highly water resistant tarpaulin fabric. Military inspired elements decorate the bag. It comes with a small Maglite