To this end, the constituent materials and other components of those types of PPE must be chosen or designed and incorporated so as to ensure, as far as possible, complete leak-tightness, which will allow where necessary prolonged daily use or, failing this, limited leak-tightness necessitating a restriction of the period of wear.
Chuige sin, caithfear comhábhair agus comhpháirteanna eile na gcineálacha sin TCP a roghnú nó a dhearadh agus a ionchorprú sa chaoi go n-áiritheofar, a mhéad is féidir, go bhfuil teinne ligin ann, a cheadóidh úsáid laethúil fhada más gá, nó mura féidir sin, teinne ligin teoranta a chiallaíonn go mbeidh srianadh ann maidir leis an tréimhse chaithimh.