3 Star Industries’ marine fabric is water repellent, tear resistant, puncture resistant, mildew and UV resistant. The windows are made of durable Aqua-View Smoked vinyl allowing for an uninhibited view and total clarity. The YKK zippers offer crosswise strength that’s unmatched in the industry. 3 Star also uses marine sewing thread made from selected high tenacity, heat resistant, continuous multi filament polyester yarns. Along with the highest quality materials, all 3 Star Industries’ Enclosures are hand measured and handcrafted to ensure a precise fit.