What does it mean?

Chukka / Derby Boot

It is believed that a Chukka boot has both a sporting and a military heritage. A Chukka boot (or Desert boot) is constructed using three pieces of outer material – Inside Quarter, Outside Quarter and Vamp with low cut leg (but above the ankle) and two to three eyelets. In contrast, a Derby boot is a fully lined, high leg and all together, more substantial boot with variations similar to a Derby shoe. Chukka boots are usually considered unlined, although lined versions are available and they are often regarded as the most comfortable of all styles.