The best spring dresses can take on many forms and silhouettes, but what sets them apart from other seasonal frocks is a few specific factors. First, the length: The warmer the temperature, the more leg you’ll want to bare — and midi and mini skirts are obviously far easier to throw on when the heat index reaches the right levels. Secondly, spring dresses, for the most part, tend to be flowier and flouncier, which means lots of playful boho silhouettes, such as tent-like skirts or breezy sheath dresses that drape over the body (instead of clinging to it). Third, the hallmark of a true spring dress is one that’s constructed from airy, lightweight materials that allow for movement and ventilation, like chiffon or Anthropologie’s Magic Fabric blend of viscose, linen, cotton, and elastane.