Canvas covers, the best options availableCanvas boat covers; sturdy, heavy duty and the best possible protection for your boat. Canvas will protect your boat from the sun and all the uncontrollable elements. This is the strongest, most solid weave of material for optimal protection for your boat.The construction of the canvas boat cover.These canvas boat covers are made of cotton material, with a very tight weave of the simple under/over technique. There is the regular canvas, and there is the duck canvas. The difference is in how tight the weave is on each canvas. There are two grades that canvas is evaluated in, by weight and by number. Keep in mind as you compare boat covers; one number represents the weight, and the other number (in reverse of the weight) represents the lighter or heavier the quality of the material. The higher this number is the lighter the material.Canvas has improved greatly from the past. Previously, made of linen it didn’t offer a good solution. Today, however, canvas is cotton based. Since the 20th century, it has been called “cotton duck”. Designed in a tighter technological weave with more stretch to allow for a more snug fit over your boat;…