Ear defenders selected as suitable for truss assembly when power tools are involved - whether by self or others in the vicinity.
IMPORTANT NOTE: special care must be taken when wearing ear defenders in a working area where conditions are variable and less controlled than for example a factory (e.g. exhibition hall), as aural warnings may not be heard. In the case of exhibition stands, use of ear defenders should be confined to the area you are working in, i.e. the specific stand.