[Bill Douglas]

When I worked at the Unilever factory (soap, dishwashing liquid, shampoo...) and did a LOT of walking we were meant to wear steel cap boots. Some days I was absolutely exhausted at the end of the day, and other days I was fine. I figured out it was the heavier steel cap boots that were tiring me out. As I walked it was one kilo one kilo one kilo... Whereas the other boots that looked like lightweight hiker boots were 300 grams 300 grams 300 grams as I walked. Adds up over a day.