GP-5X Black Frost With the new GP-5X, The roots of car helmet design may be seen at the special visor mechanism. Instead of the usual smooth holders, efficient looking aluminium fasteners are used, just as in the F1. Also the visor is typical for car sports with its 3 mm thickness. Even the posts for the HANS (head and neck restraint system) are present at the GP-5X! more... Price: £299.99