Before you ask: TTD stands for Tunnel Tie Down. It’s a patent-pending system that allows you to drop the tunnel of your skirt down to the deck in a compact roll for ventilation and improved access to the interior of your boat. But that’s just one of the many features, which include reinforced abrasion wearguards, mesh deck pocket, adjustable deck stay and our innovative “easy-Reach” grab loop system. Made of 210 denier nylon fabric coated with polyurethane, this sprayskirt is lightweight and durable and fits conveniently into a provided stuff sack.