Abstract: A crash helmet such as for use by motorcylists having an inner shell of shock-absorbing material and an outer shell and visor which are constructed as a single integral piece of transparent hard plastic material which fittingly surrounds the greater part of the inner shell. The outer and inner shells are connected to hinges transverse to the side portion of the helmet.

Abstract: A safety belt including a length of webbing which is entrained across the torso of a seat occupant, has its ends coupled such that as one is paid out the other is taken up at a different rate and vice versa. The webbing at each anchorage member may be turned through an angle greater than 270.degree.. One of the webbing ends may be fixed to the vehicle and the webbing then entrained around a pulley and back upon itself, the other webbing end being fixed to a yoke supporting the pulley. Alternatively, one webbing end is attached to and wound up on a first drum and the other webbing end is attached to and wound up on a second drum, the first and second drums being coupled for rotation at the same or different angular speeds. The drum may be biased to ensure excess webbing take up. The webbing may be stored on the drums so that it can be initially paid out by both drums until the end of the webbing is reached on one drum, whereupon the webbing is paid out by one drum and taken up by the other.