Now all Semi-Custom covers include tie-downs and shock cord in hem for a custom fit against your hull. Our covers are designed to finish 4-6' below the rub rail. Both PolyCotton and Polyester covers have 4-ply seams, sewn in tie-down loops, double folded hems and are Fully Trailerable! Polyester covers also include a generic reinforcement patches in high wear areas such as the windshield. Remember to properly support your cover when not trailering for years of use!