The Marlow Formuline 3.8mm Rope is the industry-standard rope used in most windsurf rigs for downhauls and outhauls. Trusted by windsurfers worldwide, this is the rope you'll find on the majority of windsurf setups for good reason - it simply works. Manufactured by Marlow, a leading name in marine cordage with decades of expertise, Formuline rope is engineered specifically for the demands of windsurfing. The 3.8mm diameter has become the go-to size for downhaul and outhaul systems, delivering the perfect balance of strength, handling, and durability that windsurfers need. Key Features: Industry-standard rope for windsurf downhauls and outhauls High-strength construction for reliable performance Low stretch characteristics for precise rig control 3.8mm diameter - the proven size for windsurf rigging Excellent UV and abrasion resistance Soft and easy to handle, even when wet Durable braided construction Marine-grade quality for saltwater environments Common Uses: Windsurfing downhaul lines (most common use) Outhaul systems (most common use) Control lines and rigging Equipment repairs and replacements Custom rig modifications Technical Specifications: Brand: Marlow Product: Formuline rope Diameter: 3.8mm Construction: Braided Features: Low stretch, UV resistant, high strength Sold per metre The Marlow Formuline 3.8mm Rope is what you need when it's time to replace or upgrade your downhaul or outhaul lines. This is the same rope used in most windsurf rigs around the world, proven through countless sessions in all conditions. Keep spare metres on hand for quick repairs and replacements. Browse our range of windsurfing rig parts and explore more windsurfing equipment.