100% Polyester. Universal Fit. Designed and constructed to withstand the stresses of towing by controlling the damaging effects of the wind. Constructed with tie-down loops above the gunwale and an adjustable elastic cord that runs the full length of the hem. Every cover has 1/2" poly webbing sewn across each seam. Cover comes complete with shock cord and braided rope for tie-down. Titanium-300 Denier Polyester. Heavier weight. 5 year warranty. For Length 21-23'. Beam width to 105". Model: V&Tri-Hull Run-a-bout,low profile Cuddy cabin.