Markilux 37 plus is certified according to Öko-Tex Standard 100 Here are a few stand-out improvements from 37+ over the traditional boat cover fabric: - Higher water density - Improved resilience for wrinkle-free tops - Reduced gray breaking for perfect look - 100 % UV protection - Better rubs - Improved tensile values Fabric: PES, Tight weave , thread spinning jet dyed Tensile strength: 2200 N chain , shot 1200 N Coating: one-side Polyurethane, use the coating-side at the back or inside. Weight: about 310 g / sqm * Weatherproof * Light fastness: 7-8 * Color-fast through spinnerets Dyed yarn * Polyurethane Coated * 100% Waterproof ( water pressure resistance according to EN 20811 approx 1500mm ) * UPF 50 + in accordance with EN 13758-1