What material is a wake boat cover made from? I have an expensive sunbrella cover that works...just ok. You have to clean with soap and some bleach each year and reseal with 303. Never looks great in areas with rain. Wake boats have it figured out. Good material that always looks good, no annual maint. Great tie down type strap just below the rub rail. Simple posts to hold it up....can this be Custom made for a west coast deck?