This document discusses the technique of relay cycling. It explains that a relay occurs when the lead cyclist moves laterally to the left, allowing the following cyclist to take the lead position. It is important for the transition to be synchronized without hindering the group. The departing cyclist should move to the right or left of the group based on wind conditions or prior agreement. Key aspects of effective relays include avoiding them on slopes or curves, maintaining a constant speed after taking over to prevent cuts in the group, and making gradual changes in pace when in the lead position.