Manual Rope Grab, 5 8 in, 3 4 in, O Ring ORS NASCO Larger surface area means more Larger surface area means more air flows in and out of the mask without a valve Durable Dura Mesh® shell prevents collapsing from heat and humidity FlexFit® design fits the contours of the face and mouth for comfortable extended wear Soft foam nose cushion and pinch free nose bridge Saddle leather with thick felt padding Features metal buckle and leather strap Ideal for gardening corrosion resistant stainless steel construction Lightweight and easy to use Rope grabs move easily up and down vertical lifelines to provide continuous fall protection In the event of a fall