When you are walking a lot, whether for work, pleasure or as a tourist visiting a new city, you want your feet to be as comfortable as they possibly can. It can be difficult to find comfortable shoes that are not sneakers, but very often sneakers are too casual for what you're planning on doing that day. In situations like this, it is very valuable to have access to some walking shoes that don't resemble sneakers.
Boat shoes are shoes that were designed to be used on yachts and while sailing. They combine the comfort and ease of motion of a sneaker, with the the more stylish appeal of a loafer. Some of the most popular manufacturers of boat shoes are companies like Tretorn and Sperry Top-Sider. Boat shoes are designed specifically with comfort and stability in mind.
Loafers, similar to boat shoes, are designed to be more elegant and stylish than sneakers while still providing comfort, a good fit and support for the feet.
Kitten heels are a step between flats and high heels but offer the comfort of flat shoes. Good kitten heels have rubber soles which help absorb shock to the balls of the feet, making walking comfortable while allowing the wearer to look stylish and even get a little bit of added height.