A light-walnut brown leather, this 4-pen roll is extremely soft and supple to the touch. It shows some wear but it is so amazing to touch. The interior is likely a grey nylon fabric with slots big enough to hold a Montblanc 146, maybe even a 149, but that seems as if it would push the boundaries of the slots. Also inside is an unsecured pocket, and a very small zippered pocket for securing ink cartridges or rollerball refills. 18.8cm long.