Shoe were made of leather, wood or canvas some decades back. Currently, a shoe are made of lot of things like rubbers, plastic, other petrochemical derived-material. Foams are mostly used to provide support in the upper of shoes for comfort in the foot. In the 19th century, not many would have lots of pairs of shoes in their wardrobe unless they were athlete or into any kind of sports. But, that has changed a lot in the 20th century were its always common to have 3-4 pairs of shoes per person on an average for their daily needs Today, the average life of a shoe before it gets discarded is around a year only and it shows the lifestyle that we are moving towards. Its not that the shoe becomes