AGV helmets feature three different types of fasteners: the Double-D fastening system, the buckle with fine adjustment and the quick-release buckle. The more sporty models all feature the Double-D fastener, simply because they are part of the MotoGP competition standard. The others feature a simpler fastener, and are designed for the tourism and comfort lines. All the fastening systems undergo factory testing as well as tests required by safety standards and relating to strength and fastness.