There are three very important things required in a good pair of shoes – flexibility, durability and comfort. Though they are separate factors, they are correlated. Flexible shoes are easily bendable, and therefore provide optimum comfort. Since they are supple they do not restrict movement and prove to be durable because they are easily broken into and wear well.
It is important to check if shoes are flexible before buying them. Try on every pair of shoes you intend to buy. Walk around in them in the store like you normally would, to check if the shoe conforms to your feet. An ideal pair should fit like a glove and allow free movement. If your attention goes back to your feet each time you shift position, then you probably need to try on another pair.
If you choose to order shoes from shoebuy, check out the specifications where details of the product are provided through which you could judge whether or not the pair would be flexible.
Flexibility can be ruled out in shoes with overtly thick soles. Such shoes limit movement as they cannot bend easily because of the thickness of the sole. Inflexible shoes are not just uncomfortable but also obstruct movement. As a result feet develop blisters, and calves turn sore. It is impossible to stay in shoes that restrict movement for long hours.