C. Stiffness - continued

Dianna’s Science Advice:

Increase the stiffness of your hair mass by using styling products that contain holding polymers. Holding polymers can temporarily improve the stiffness of your hair by bonding together separate hairs - when the hairs work together, they have more natural lift and stiffness.

Danilo’s Style Advice:

A good haircut is very important in maximizing your hair’s stiffness. Layers and texturizing create opportunities for hair to work together for greater lift and stiffness. To achieve texture, try using a styling wax.

D. Curvature

This one is pretty simple. Curved or curled hair takes up more space than straight hair
  
Curl vs. Straight

Dianna’s Science Advice:

Be sure to use a foundation styler like mousse or gel to help set the curve. Heat makes the styling polymers melt and flow to increase hair-to-hair contact and provide even better long-lasting hold.

Danilo’s Style Advice:

Enhancing your hair’s natural curls or waves is an easy way to create long- lasting volume. Use a round brush or shape your hair into a curve around your fingers to help lift the roots. Use a curling iron to add volume to ends.