"Its a shoe,and a big one at that. Big enough that you can wear it over another pair of shoes.Oh but you won't need an extra bag to carry a spare pair of shoes, but you will need a "pouch" which is supplied to carry an extra large pair of shoes. Just use your existing cycling shoes and carry a bag/pouch. Or buy a pair of casual or mountain cycling shoes that have recessed clips that let you walk around and the pedals that go with them."