Introduction to Flexbox

Which properties are redundant for .flex-item? In other words, which properties will be ignored by the browser even though they are set?

.flex-container {
  display: flex;
  width: 100%;
  flex-direction: row;
  justify-content: space-around;
}

.flex-item {
  display: inline-block;
  padding: 0 2em 0 2em;
  text-align: center;
  background: #faf7f5;
  float: left;
  clear: bottom;
  border-radius: 10px;
  vertical-align: center;
}

Tip: There are four of them.