Billy Pugh WVO-100 U.S.C.G. APPROVED Type V Vinyl Dipped Vest with Internal Webbing. – 2 lbs. General Guidelines for WVO-50 & WVO-100 Inspection: Pull on the nylon webbing and stitching, if it tears or the stitching breaks…the vest should be replaced. If the work-vest has damage to the flotation then it should be replaced. If the flotation looks as though it is “flat” and has lost buoyancy, replace it. If the work-vest shows excessive wear, replace it. Keeping the work-vests out of the sun when not being used will help them last and perform better than constant exposure to UV.