Nolan Helmet N21 Special Jet 69 Size L N21 This is one of Nolan’s mini jets. It is characterised by a blend of modern design and “vintage” inspiration, as well as the wide range of colours and graphics available. racer” motorcycle sectors (thanks to its particular aesthetic aspects). Furthermore, the special attention paid to the combination of materials, finishing and colours, as well as the wide range on offer, make the N21 a mini jet which attracts a broad cross-section of the public, whether they are looking for a classic style or are more interested in current fashions.