Sole type: Suede-Chromo (flexible), Leather & Rubber.
Full Chromo (The most flexibles, also called suede soles): Shoes produced on the bases of full chromo structure are the most flexible and lightest.
Cromo is more fragile and last less than leather.
Some professional dancers only use such shoes for practice. They slide softly and they give you a very good control of your steps. To be used only on dance floor.
Chromo half sole (Also called Half-Suede): Is not flexible. Will give you a lesser sliding but a better control of your steps. To be used only on dance floor.
Leather sole: Is more rigid than the chromo sole, is very popular and last more than the chromo ones. They slide a bit more than the chromo ones.
Rubber sole: Will bring you the best adherence with lesser sliding.