Manhattan Portage [About the materials used].

Manhattan Portage's classic bags are made of the time-honored CORDURA® brand fabric, which has withstood the rigors of the world's toughest environments. Known for its exceptional durability, this fabric is used extensively in the outdoor and travel bag and workwear industries, and Manhattan Portage uses the highest quality 1000 denier CORDURA® Classic Fabric with a water repellent finish.

CORDURA® (Cordura®)
Classic Fabric (1,000D)

This material has the longest history among CORDURA® fabrics and has been produced for a long time.
The high-density weaving of CORDURA® Ny66, processed by a special air-jet machine, gives it top-class strength, and its durability has been proven by its use in the world's toughest environments, such as the US Military.