Not only can you release your helmet one handed, but it also makes flapping webbing a thing of the past. Another benefit is that since it's micrometric, it can ratchet into multiple positions like zip ties. You can adjust it exactly how you want it for every single ride with precision, even while riding.

Close up view of an open quick release buckle on an AGV helmet. The quick release buckle (also known as the seat belt style buckle) is an easy to use buckle where a metal end part (usually with a hole in it) goes into a spring operated catch (this system works similar to a seatbelt on a car).