A casual medium wavy hairstyle can be described as free-flowing, soft, full, with lots of body and easy-going. These hairstyles can vary from shoulder length graduated layers, to heavy one length looks, and even messy uniform layer cuts. When waves are natural or even artificial (permed hair), casual medium wavy hairstyles are quick and easy to create because the waves and cut determine the shape of the hair.
Waves created with curling devices and heat appliances require more time and styling products for hold. Some techniques you might like to try are simple things like ruffling, finger drying, and scrunch drying. The medium length of these hairstyles also enables you to pull/tie your hair back- getting it out of the way or dressing it up more formally.