Mmmmmmmm...interesting!
Did you notice the small print at the bottom of the advert....
"Ben-der waders are researched and developed at Haddo Trout Fishery and on the River Don in Aberdeenshire, Scotland. The Ben-der wader range is ideal for trout fishing on our lochs and rivers and is enjoying a growing reputation for innovation, quality and value for money. With their nice supple feel and very low memory, they are simply a pleasure to wear for day to day use and, if polished, for more formal occassions!"