Jones wonders what the difference is between British parachutes and Nazi parachutes. Mainwaring's memo tells him that British parachutes are white, while Nazi parachutes are a dirty, creamy, off-white.
Jones seeks to understand the distinctions between British and Nazi parachutes. Mainwaring's memo reveals that British parachutes are white, while Nazi parachutes have an off-white coloration that is slightly stained or dirty.