Oddly, Zyklon just isn't a good name for a shoe. Or just about anything. However:
Umbro said the Zyklon name, which was chosen by a designer in the firm's footwear department, had been on the side of boxes for the trainer since its launch in 1999, but does not appear on the shoe itself.
They've been using this name for three years now, and no one has noticed until just recently?