The california sunbounce wind killer is a portable wind break developed for use on location and measuring 90 x 125 cm it is designed to allow some air to permeate reducing wind to 25 of strength as an impenetrable wind break causes turbulence that can wreak havoc with your models coiffure and makes steadicam use extremely difficult the screen can also be used as a mottled diffuser the screen does not include a support system