Instinct trail Bags and waist packs Waist pack Master-Piece’s accessories, and this backpack is case in point. It’s made in Japan using CORDURA® ballistic nylon — which is five times stronger than ordinary nylon, FYI ¬— and comes with a handy Dina and flap closure for access on the go. Large mesh pockets and a black leather scuffed tab are used to complete the city-ready piece.