Gaerne carbon stilo shoesthe eps lightweight full carbon soles on these carbon stilo shoes ensure total lightness and firmness you also get ultimate pedalling power without losing energy due to the ultra thin carbon which allows the feet to be positioned at a minimal distance from the pedals replaceable insertsthere are two channels positioned in the soles that give perfect airflow to the feet when you are cycling and non slip rubber inserts in the front and back of the soles provide extra se