The largest of our heavy-lift canvas bags, this workhorse delivers a 500# load rating with 2 fully supporting lift slings OR 4 steel rings to grab on to. 24oz. DWR Canvas outer material, lined with 18oz VCP (vinyl) and 1000d Dry-Tight roll-top closure. Low-mount grab handles and document pouch included. Welded Vinyl waterproof base to prevent saturation and improve abrasion resistance.